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The conditions for obtaining substances and intermediates using the available purified raw materials of coke chemistry were experimentally selected and improved. The technological process and the scheme of synthesis of the thermocouple dye of yellow 6Z is developed, using as a raw material isolated from coke resin and purified anthraquinone. Improved technology for the synthesis of thermocouple dye yellow 6Z is a little expensive and allows you to increase the output without degrading the quality of the final form of the dye. Translated printing is of great interest for the proposed printing of dispersion dyes of chemical fibers. Translational coloring of textile materials and products as one of the simplest, most economical and environmentally friendly technological processes. Initially, the method was printing has a number of indisputable advantages that make one of the most promising areas in the coloring of textile fabrics. The method of thermal printing is simple in technical design: in the presence of a printed substrate for the printing process is enough to have a thermal press or calender, which can be serviced by one operator, which saves capital costs for equipment and leads to minimizing the workplace. Translation printing is of great interest for dyeing textile materials and products as one of the simplest, most economical and environmentally friendly technological processes. Initially, the method was proposed for. The image printed on the fabric has a mirror image.The improved technology of synthesis of thermal transfer dye yellow 6C in comparison with the current technology takes place at a much lower temperature of 45±5oC (according to the current technology - 120±5oC) without pressure at the duration of the methoxylation reaction 6 hours (instead of 46 hours according to the current technology). This technological technique allows to increase up to 8% the yield of the target product in high quality.The yield of dye by advanced technology per loaded 2-bromobenzantrone is significantly higher compared to the yield of the current technology.In the process of improving the technology, the selected conditions for obtaining substances and intermediates using available purified raw materials of coke chemistry in the synthesis of thermal transfer dye yellow 6C anthraquinone were substantiated, the technological scheme of synthesis was drawn up final form of dye, the technological scheme of synthesis is made, using as initial raw materials the anthraquinone isolated from coke resin and allowed to increase with improvement an exit of a final form of dye.

Achieving stimulus-responsive room-temperature phosphorescence (RTP) materials with high practicality in a facile manner remains challenging. In this issue of Matter, Yang, Tang, Li et al. harnessed the mighty distance-sensitive Forster resonance energy transfer strategy to generate a highly efficient stimuli-responsive RTP system. Moreover, synchronous thermal printing and information encryption was unprecedentedly realized with the developed FRET-based RTP material.

Summary In this work, Forster resonance energy transfer (FRET) is utilized to construct a stimulus-responsive room-temperature phosphorescence (RTP) system. Owing to the specificity of the FRET system and its sensitivity to distance, the resultant material shows turn-on persistent RTP emission upon force or heating stimulus. Furthermore, a near-perfect compatibility with existing printing technology is demonstrated for this material, especially for thermal printing. This finding could provide a simple, efficient, and truly commercially viable construction strategy for RTP material.

In this article, we present the design and realization of an electronically rewritable RF encoding particle (REP) for chipless RFID applications. This (REP) resonator geometry is integrated with two conductive bridging random access memory (CBRAM) based non-volatile RF switches, and could be electronically programmed using DC pulses to any of possible four resonant states to represent two bits of information. Emerging additive manufacturing (AM) technique based thermal transfer printing is utilized for the realization of this resonator on flexible and low cost Polyethylene terephthalate (PET) substrate. At present the size of the REP is such that five such REPs could be arranged on a standard credit card size tag. Also this REP encodes the most number of bits reported among non-volatile electronically rewritable REPs for chipless RFID applications - 2 bits, till date.

I've been recently engaged with some fairly serious projects, building up my garage semiconductor fab. I wanted to take a break and build something entertaining I could share with other people without the complicated explanations that things like a laser interferometer often require. So I decided to make a digital camera that's purposely got a lower resolution than a smartphone cam but is a lot more fun.

Thermal printing is a fast, widespread and inexpensive technology that uses a developer to produce a print on the paper, among many applications. A common developer is bisphenol A (BPA), used for this purpose in its free form. Consequently, the handling of thermal paper, as evaluated by the European Food Safety Authority, was reported to be the second largest source of external human exposure to this endocrine disrupting chemical. Recently, reports have been made on the substitution of BPA by alternative developers, which are yet less studied. In this study, 311 receipts and other thermal paper products were collected from 14 countries in Europe, Asia, North America and Oceania and analysed using liquid chromatography coupled to quadrupole time-of-flight mass spectrometry. BPA was the most frequently used main developer and was detected in 194 thermal paper samples, which represents a detection frequency of 63%. A statistically significant difference in the detection of BPA was shown between continents. BPA was followed by bisphenol S (BPS) which was detected in 64 samples as the main developer. Pergafast 201 was the third most abundant main developer and detected in 37 samples as the main developer. Less frequently used main developers included BPS-MAE, TGSA, d -8, and d -90, many of them being BPS derivatives. Two oligomers of d -90 (n = 1 and n = 2) were also identified. The sensitizer diphenyl sulphone (DPS) was identified using high-resolution mass spectrometry for the first time and detected in combination with other developers than BPS for the first time. Despite the lack of structural, nation-wide legislation prohibiting the use of BPA in thermal paper, it is clear that alternative developers are currently globally in use for the manufacturing of thermal paper.

Even though numerous thermochromic fluorescent materials (TFMs) have been reported, effective and universal strategies for the development of ideal TFMs with simple preparation, low cost, excellent performance and practicability are still urgently required. Herein, we report a simple and general platform for such TFMs via taking biomimetic lipid like fatty acids (FAs) as an effective matrix which is applicable to abundant simple fluorophores. Change of crystallinity of FAs induced by phase transition regulates the reversible interconversion between non-dispersion and dispersion states of fluorescent dyes (e.g., coumarins), thus leading to obvious fluorescence (FL) change of the TFMs based on both. The reaction mechanism was proved in detail by FL spectra, XRD and SEM techniques. The substituent effect of coumarins and the nature of FAs play important roles in adjusting the properties of the TFMs, such as FL colour and responsive temperature. Additionally, their multiple feasible potential applications (i.e., in situ thermometers, thermal response FL papers, FL colour change crayon, anti-counterfeiting and encryption, erasable or long-preservative thermal printing) with selective multi-mode (i.e., groove-fill, writable pen, loading on paper substrate) were developed. These TFMs with the merit of easy preparation, low cost, obvious colour change (ca. 100 nm shifts), fast response speed, good reversibility and high adjustability are very close to industrial application requirements. The design and preparation principles from this work should facilitate the development of other novel stimuli-responsive fluorescent materials.

Research of purely organic room-temperature phosphorescence (RTP) materials has been a hot topic, especially for those with stimulus response character. Herein, an abnormal stimulus-responsive RTP effect is reported, in which, purely organic luminogen of Czs-ph-3F shows turn-on persistent phosphorescence under grinding. Careful analyses of experimental results, coupled with the theoretical calculations, show that the transition of molecular conformation from quasi-axial to quasi-equatorial of the phenothiazine group should be mainly responsible for this exciting result. Furthermore, the applications of stylus printing and thermal printing are both successfully realized, based on the unique RTP effect of Czs-ph-3F.

In the era of rapid economic development, large shopping malls are an indispensable part of China’s economic construction. However, there are still many problems in the management system of large shopping malls in China, such as the disordered commodity placement, the difficulties to find the required commodities when the shopping malls are too big, etc. How to solve these problems is an urgent matter to be solved at present. In order to solve these problems, we designed an Radio Frequency Identification (RFID) read-write thermal printer and its management system of the commodity tags. The RFID read-write thermal printer can quickly print RFID tags, at the same time, it is portable and safe. The commodity tag positioning management system reduces the workload of the mall management personnel, enhances the security coefficient of the mall, facilitates the accurate positioning of commodities, and analyzes the sales data.

The research of purely organic materials with long afterglow has drawn more and more attention, especially for those with stimulus‐response characteristic. So far, this kind of material is really very scarce and their performance is not good enough. In this study, we successfully developed an efficient heating‐responsive room‐temperature phosphorescence material with phosphorescence efficiency and lifetime up to 13.4% and 2.08 s through the simple host–guest doping strategy. Further on, by introducing the additional energy acceptor of fluorescein with concentration‐dependent emission to construct ternary doping systems, the afterglow color was extended from blue to yellow. Accordingly, the multicolor thermal printings have been easily realized, showing the great practical application prospects.

V magistrskem delu je predstavljeno oblikovanja sistema označevanja izdelkov in polizdelkov z oznakami za sledljivost, ter oblikovanje sistema za zagotavljane sledljivosti. Z metodo bilateralne primerjave vnaprej določenih kriterijev za izbor ustrezne oblike zapisa oznak ter ustrezne tehnologije izdelave zapisa, ter matrikami odločanja po izbranih kriterijih vrednotenih posameznih oblik zapisa ter tehnologij izdelave zapisa, sem izbral kot najustreznejši zapis označevanje s QR oznakami, kot tehnologijo označevanja pa termični tisk nalepk ter lasersko označevanje PVC polizdelkov. Na osnovi sistema označevanja je nadaljnje oblikovan sistem sledljivosti materialov, ki povezuje interno z verižno sledljivostjo. Oblikovan sistem omogoča sledenje vgrajenim materialom od vhoda v skladišče do končnega izdelka ter obratno. Z uvedbo sistema v podjetju vplivamo tako na zaposlene, poslovne procese kot tudi na kupce same. Izognemo se nepotrebnemu administrativnemu delu, zmanjšamo možnost nastanka napak kot posledica človeškega faktorja, avtomatiziramo procese ter uvedemo nadzor nad njimi v podjetju, s čimer optimiziramo upravljanje kakovosti. Sistem omogoča tudi hitrejše, učinkovitejše po prodajne aktivnosti, ki hkrati prinašajo nižje stroške ter dvigujejo zadovoljstvo kupcev. The following master thesis thesis presents the current state of traceability of products in the company with the purpose of developing a system of labelling them with traceability tags, which enables the development of traceability system. Using the method of bilateral comparison of predefined criteria for the selection of the appropriate label format and the appropriate marking technology, as well as the decision matrix according to the selected criteria of the individual labeling tags and marking technologies, I selected QR labelling as the most appropriate tag, and thermal label printing technology combined with laser marking of PVC products. On the basis of the labelling system, a further system of material traceability is developed, which links internal with chain traceability. The designed system allows tracing of embedded materials from the entrance to the warehouse to the finished product and vice versa. With the introduction of the system, it affects employees, business processes and customers themselves. It helps avoiding unnecessary administrative work, reduce the possibility of errors as a result of the human error, automate processes and introduce control over them, thereby optimising quality management in the company. The system also enables faster, more efficient after-sales activities, which at the same time bring lower costs and increase customer satisfaction.

Point of care testing device is a diagnostic tool that can provide clinically relevant information without the need for a core clinical laboratory, and it has been widely used in medical diagnostics, food safety and environmental monitoring during the last years. This research aims to develop an affordable and portable POCT device for improving disease screening in the developing world. This device is based on the embedded ARM, bioelectrical impedance measuring technology (BIMT) detection and spectrophotometry detection approach, and it consists of optical module, data acquisition, microprocessor, human-computer interaction, power supply and communication interface module. The optical module adopts 532nm LED as a green light source. A silicon photodiode, operational amplifier and 16 bit A/D converter are used to accomplish photoelectric signal change, amplification and analog-to-digital conversion. The microprocessor is STM32F407ZGT6 chip ARM based on Cortex-M3 kernel. Touch screen LCD combined with Matrix keyboard are utilized to insure human-computer interaction. The test results are stored in SD card, and can be printed in real-time by a built-in thermal printer. This portable device has USB and Bluetooth connector with a lithium battery as a power supply.

In this paper, we design and implement the transaction device based on two operation methods, i.e., with contact and without contact with smart cards. The system can be divided into three parts: hardware (transaction device), software (transaction application), and server. In this work, we focus on the hardware design that comprises smart card reader hardware, LCD display - touch panel, and battery charger circuit. ATMEGA 328P was chosen as a data exchange controller between the smart card and smart card reader. In contrast, the Raspberry Pi 3 Model B (single-board computer) was utilized as an application processor due to several features offered, such as I/O, graph processing unit, and enough memory. Our electronic transaction device can be connected to the thermal printer. Therefore, the transactions report (e.g., Top-up, balance check, payment activity, and so on) can be printed out. The developed device has a tiny dimension and lightweight to carry, hence it can be categorized as a portable device (easily moved everywhere).

In this paper, we proposed a self-ordering machine for canteen named SELFO. Nowadays, the ordering system in canteen requires a lot of cash for change money, a tiresome daily manual recapitulation, and order forms that require sellers to spend extra money. Therefore, we proposed a machine as a solution to those problems. This machine can eliminate the need of change money, do automatic recapitulation and reduce the cost of order forms. Customers can order menu using an interactive menu in this machine, pay using a contact card, and wait for the order to be delivered, while recapitulation data is stored directly in the database. The hardware Machine designed using Raspberry Pi 3B+, touchscreen LCD 10.1”, thermal printer, and the card reader that we made based on ATMEGA 328P. While the software program is based on python.

Thermal paper is widely used as a print medium for different applications but it constitutes a tricky substrate for fingermark visualization. An earlier work (J Forensic Sci 2015;60:1034) reported how to visualize fingermarks on untreated thermal paper by illuminating the item with a UV-A light source. In the present paper, the potential of the near infrared (NIR) luminescence has been tested on thermal paper compared to the mentioned method. A controlled study was carried out utilizing eccrine enriched fingermarks. The promising outcomes obtained were further confirmed by performing a pseudo-operational trial. Data clearly showed that the use of the NIR filter gave better results. Finally, preliminary tests suggested a different mechanism of reaction induced by fingermarks with respect to the one behind the thermal printing. Thus, NIR luminescence represents a refinement to the suite of optical examination processes, including the potential to increase the number of marks recovered in a noncontact, nondestructive way.

Artificially structured thermal metamaterials provide an unprecedented possibility of molding heat flow that is drastically distinct from the conventional heat diffusion in naturally conductive materials. The Laplacian nature of heat conduction makes the transformation thermotics, as a design principle for thermal metadevices, compatible with transformation optics. Various functional thermal devices, such as thermal cloaks, concentrators, and rotators, have been successfully demonstrated. How far can it possible go beyond just realizing a heat-distribution function in a thermal metadevice? Herein, the concept of encrypted thermal printing is proposed and experimentally validated, which could conceal encrypted information under natural light and present static or dynamic messages in an infrared image. Regionalization transformation is developed for structuring thermal metamaterial-strokes as infrared signatures, enabling letters of the alphabet to be written, paintings to be drawn, movies to be made, and information to be displayed. This strategy successfully demonstrates an extreme level of manipulation of heat flow for encryption, illusions, and messaging.

A novel compact printable dual-polarized (DP) chipless radio-frequency identification (RFID) tag is presented along with its real-world implementation challenges. First, the DP tag with simulation and measurement results is presented, where ‘U’ shaped slot resonators are re-used in both vertical (V) and horizontal (H) polarizations to double the encoding capacity within a fixed bandwidth. Next, slot-length variation encoding technique is added to reduce the tag size by 50%. After that, a 16-bit proof of concept DP tag is developed that achieved 16.6 ${\rm bits/cm}^{2}$ data density, which is the highest among the reported works. Next, a step-by-step guideline is presented to overcome the real-world challenges for implementing printable chipless RFID tags, which starts with a detail study on the effect of ink conductivity, and permittivity and loss tangent of the substrate on the tag performance. Then, a quick approximate substrate characterization technique is presented, which is verified by measurement of thermal printed patch tags. Finally, tag printing procedure on paper using a thermal printer is briefed, which is followed by a discussion on some printing inaccuracies and their plausible solutions. All these analysis will build a firm understanding and practical insight on implementing the proposed promising conductive ink printed chipless RFID tag for identification, authentication and sensing.

The traditional thermal printer of retail weighting apparatus can't be quickly assembled and disassembled in the process of assembly, which affects the production efficiency. This paper presents a thermal printer structure that can be quickly assembled and disassembled for the retail weighting apparatus, aiming to reduce the assembly process and improve work efficiency. Use the finite element simulation to analyze important components in the quick assembly and disassembly structure to ensure the strength requirements and stiffness requirements. Provide a new design direction for the thermal printer mechanical structure.

Printing is a major use of paper. Moreover, many paper-converting operations include printing. Printing is often defined as “the use of ink to transfer an image on a substrate such as paper”; it implies the generation of a “large” number of reproductions. The various methods of printing high numbers of reproductions center on the plate, which carries the image to be printed. Plates may carry type, pictures, or both. The purpose of the plate is to transfer the ink in the form of an image to the paper to give a clear copy of the image of interest. Three possible geometries are available and define the basic processes of letterpress, raised printing surface; lithography, printing and nonprinting surfaces that are in the same plane; and gravure. The fourth main geometry is used in screen printing, which uses a stencil or porous plate. Other types of printing methods include electrophotocopy, laser printing, inkjet printers, and thermal printers. There are some other important considerations in printing. Dot gain represents the increase in dot size from the plate to the printed image. Dot gain is a function of the size of the dot to be printed and often is greatest in the midtones; this function is called a dot gain curve. Dot distortion refers to a round dot being printed unevenly. These are a function of the amount of ink used to print, paper characteristics, and other factors.

The demand for a safer alternative to bisphenol A (BPA) developer materials for thermal printing systems has recently grown considerably because of the many potential health effects of exposure to BPA. In this study, we tested the use of hyperbranched polymers as replacements for BPA, and determined the structural features of their polymer backbones that control the developing capability of thermal papers. For this purpose, a novel series of hyperbranched polyester copolymers with linear and terminal phenol groups were prepared via one-pot A2 + B3 reactions of phloroglucinol with various feed ratios of terephthaloyl chloride and adipoyl chloride. The variations with the proportion of alkyl chains in the backbones of the structural, thermal, and color-forming reaction properties of the resultant polymers were investigated. Moreover, the preparation of thermal papers with these polymers was carried out and their developing capabilities were compared to those of BPA–based thermal papers.

This paper describes a thermal design method of printing process in printers that a lot of electrical components are mounted and the structure in the inside becomes complex because miniaturization and more additional functions are strongly demanded. Most of printing methods such as a laser printing and a thermal printing use heat in order to do the printing. In order to increase a reliability of the products while improving the printing quality and decreasing power consumption, elucidation and an optimization of heat transfer mechanism of the printing processes becomes important. However, the internal structure of the device has become significantly complicated. In order to achieve the optimization of thermal design in the printers, it may be useful to evaluate the dominant factors affecting heat transfer phenomena and the degree of influence to the temperature response during the printing process. In this research, we aim to construct a specification method of the control factors that affect the heat transfer phenomenon during the printing process to obtain the optimum design value of the components. We especially focused on the design process of a fixing belt. As a design objective of the belt, it is required that the temperature response is fast and the temperature on the heated belt is not changed during the printing process. In order to achieve these conflicting requirements, we tried to optimize the belt structure by combining three — dimensional heat transfer analysis and Design Of Experiments (DOE). Through the research, we acquired the design guides for the belt corresponding to purpose of using applicable printing machine and report the result.

Police lab for testing requirements bullet speed, we designed a microcontroller based on the laser gun. The microcontroller as the core for speedometer, with laser detection plate module, thermal Printer module, display and buttons module, USB data interface module, wireless modules and stable voltage module, it can measure the speed of a series of work by Ligation of these modules. First, fired projectiles for testing by the laser detection plate module. Then, Transfer the detected data into the microcontroller. In the microcontroller detection data is processed and then printed out by thermal printer. Via USB data interface for data uploaded to a computer to save. While on the steps required to be operated by the controller.

In this Paper, we present a development of high speed thermal printer. A Thermal printer produces a printed image by selectively heating thermal paper as it is commonly known, when the paper passes over the thermal print head the coating turns black in the areas where it is heated, producing an image. The Printer works at a maximum speed of 80mm/sec on a standard paper. And even it works on RTOS. We are implementing these printers using Synergy S1 Controller and These Printers are light weight and well compact. & used in wide range of applications such as in ATMS, Transport, healthcare, Grocery stores & supermarkets etc. Thermal printers have only one or two moving components, easy to operate and maintenance cost is also very low. In ATMS Once the transaction is done then the machine will issue a receipt the ATM machine does not use ordinary ink for printing. They work with thermal printing technology.

International audience; A method called " soft thermal printing " (STP) was developed to ensure the optimal transfer of 50-µm-thick dry epoxy resist films (DF-1050) on small-sized samples. The aim was the uniform fabrication of high aspect ratio polymer-based MOEMS (micro-optical-electrical-mechanical system) on small and/or fragile samples, such as GaAs. The printing conditions were optimized, and the resulting thickness uniformity profiles were compared to those obtained via lamination and SU-8 standard spin-coating. Under the best conditions tested, STP and lamination produced similar results, with a maximum deviation to the central thickness of 3% along the sample surface, compared to greater than 40% for SU-8 spin-coating. Both methods were successfully applied to the collective fabrication of DF1050-based MOEMS designed for the dynamic focusing of VCSELs (vertical-cavity surface-emitting lasers). Similar, efficient electro-thermo-mechanical behaviour was obtained in both cases. 2

Considering industrial development within the market the embedded systems are getting to play a big role in several process and control applications. Many of industries have bothered in checking package section as a result of a number of packages while not product within. In this way it's basic to possess a capable system to overcome this problem. This paper manages the load cell based cross verification of packaging material using arduino. The fundamental device utilized as a part of this case is an economically accessible load cell and TFT LCD and printing machine. This system measures the total weight of corrugated box and find out total quantities in it and also print a sticker which provide all the details of material which is packed in box.

Introduction Laboratory investigations account for significant percentage of healthcare expenses. Every hospital and laboratory especially in the government sector wants to cut down the expenses on reports and offer inferior printouts of reports. The debate of printing attractive reports (clientele aspiration) Vs costs cutting (managerial issues) continues. It becomes the moral responsibility of doctors to guide the management into implementing an effective and economical option of report transcription. Cutting cost is always good but it should be achieved in an effective way keeping in mind the expectation of all the stake holders and ensuring that quality is not significantly compromised. The data regarding economics of printing available on the Internet may be market driven and not a true reflection of printing cost. The present study was undertaken to generate data on the economics of printing reports on various platforms to enable managers to make informed decision on choice of optimal printing option. Aim To provide practical data on economics of printing reports using various printing options available in the country. Materials and methods Four printing devices (laser printer, inkjet printer, dotmatrix printer and thermal printer) were connected to the laboratory information system and the reports printed from them were critically evaluated for the following parameters - cost of stationary, printing cost, time of printing and clientele satisfaction. Results The cost of printing a single report on laser printer, inkjet printer, dotmatrix printer and thermal printers was Rs 0.75, Rs 0.65, Rs 0.20 and Rs 0.93 respectively. The time taken to print 30 reports were 162 sec, 193 sec, 210 and 60 sec respectively. Clientele satisfaction scores were best with Laser and Inkjet printed reports. Conclusion The most economical mode of printing is Dot Matrix printer using DOS output for printing. However, when the workload of a laboratory is high, then the use of laser printer is not prohibitively expensive option and can be resorted to. Use of thermal printer was found to be unsatisfactory.

This letter studies the possibilities of manufacturing copper-based passive ultrahigh frequency (UHF) radio frequency identification (RFID) tags using inkjet and thermal printing on two substrate materials, polyimide (Kapton), and a polyester-based substrate (Flexcon THERMLfilm). Both printing methods are tested to fabricate different tag designs, and the performance of successfully printed tags is evaluated using wireless measurements. Measurement results show that both printing methods, while using copper material, can be used to effectively fabricate passive UHF RFID tag antennas on selected substrates.

This paper presents a GPRS thermal printer which is based on Internet of Things. The main control chip of the printer initializes the GPRS module, connects the restaurant reservation website servers and cell phones, and accepts orders from Internet and phone messages. Then the printer prints two same receipts. Meanwhile the information on the reservation is saved in SD card. After confirmation of orders, confirmation information would be sent back to relevant network ports or phones so that they can reaffirm each other. A GPRS wireless thermal printer which is based on Internet of Things can print the customers’ order timely and remind staff to handle them in time. It can be widely used in restaurant reservation website and other relevant service.

This paper studied the principle of Bluetooth image printing technique. Based on the ESC/POS command, the function of image printing via android Bluetooth application was established and a practicable APP software was developed. The APP can link to the micro printer via Bluetooth by using Bitmap class, Canvas class to convert the selected image, including transformation, zooming, saving and finally generate a printable binary string streams based on the pixel, and send it to micro printer to print it.

Paper often faces a short useful life, with printed products ending up in the trash or recycling bin soon after they’re read. To help reduce this waste, researchers have made paper that can be written on with heat and erased by freezing (ACS Appl. Mater. Interfaces 2018, DOI: 10.1021/acsami.8b14625). A team led by Luzhuo Chen of Fujian Normal University screen-printed one side of a sheet of paper with a thermochromic dye mixture that changes from blue to colorless when heated. Above 65 °C, the paper turns white and remains so as it returns to room temperature. When the temperature dips below –10 °C, the surface turns blue again. The researchers wrote on the paper with an electrothermal pen and also printed text and images on the paper with a thermal printer. The text and images remained visible even after storing the printed materials at room temperature for 6 months. Placed

monomer) forreplacing a problematic BPA developer in thermal printing system. The resulting polymers, HPpEP andHPmEP, had highly branched structures and met well the requirements for high performance developermaterials such as colorlessness, easy and inexpensive synthesis, high thermal stability, etc. In addition, thesepolymers exhibited an efficient reaction with leuco dyes (ODB-2) for a coloring process by releasing protonsfrom linear and terminal phenol groups of polymers when heated. Key Words : Thermal printing papers, Hyperbranched polymers, Leuco dyes, Developers, Bisphenol A IntroductionThermal printing technology has been widely used incommercial applications for information recording papersystems such as point-of-sale receipts, industrial barcodes,faxes and many other types of labels because this technologyis simple, rapid, inexpensive and highly reliable.

What happens in the paper surface about ink absorption is of great important for appearance of final printing. The aim of this experiment was to investigate the influence of printing pressure and printing speed on ink layer thickness transferred onto coated paper through quantitative analysis by laser scanning confocal microscope (LSCM). Meanwhile, the influence of printing pressure and printing speed on print density and print gloss were obtained. The results implied that higher printing pressure resulted in higher ink layer thickness, print density and print gloss when printing pressure is less than 700N, but higher printing speed resulted in lower ink layer thickness, print density and print gloss when printing pressure is constant. It could be concluded that the coated paper with high printing speed compared with low printing speed resulted in lower ink absorption, lower print density, lower print gloss and worse printability on the condition of same printing pressure.

With new functional applications emerging in the digital printing industry, the need for quantitative knowledge of the reliability of drop-on-demand inkjet printheads increases. Continuous ink circulation using TF Technology™and the resulting channel self-recovery is one of the technologies which decrease the down-time of a single nozzle, but in turn increase the difficulty of an accurate reliability test. Current measuring techniques, namely the a-posteriori verification of printouts on paper proved to be inappropriate. This paper proposes a novel software approach, exploiting signal processing techniques, strong control loops and powerful system design methodologies in order to allow for the correct detection of single missing droplets at run-time. This new system is meant to relieve the effects of the indefinite environment and sources of human error. Preliminary results and the proof-ofconcept demonstrates both the system's and the design method's versatility and potential. QC 20140627

The authors compare the maximum read range of passive ultra-high-frequency radio-frequency identification tags that have been produced using different metal printing techniques, specifically inkjet printing and thermal transfer printing (TTP). They used the same substrate (THERMLfilm), antenna designs and electronic circuitry in their comparison so as to isolate the effect of the metal printing. Owing to the high metal conductivity, the thermal transfer printed tags printed with copper (Cu) film performed as well or better than the inkjet printed tags printed with silver ink, even when they changed the inkjet printed tags to a Kapton substrate that is better suited to inkjet printing. The aluminium (Al) thermal transfer printed tags had up to 33% less read range than Cu thermal transfer printed tags. TTP needs no sintering, and provides an attractive alternative low-cost fabrication method. Characterisation of the printed traces by both methods reveals that the printing techniques achieve similar surface roughness. The achieved conductivities for TTP on THERMLfilm were better than for inkjet. The best measured read range for TTP was 10.6 m. Across the different tag designs, the measured read ranges were 15-60% (1-10%) better for thermal printing, compared with inkjet printing on THERMLfilm (Kapton).