Search

This paper discusses the effects of different retention agent such as: CPAM, APAM, PAE+CPAM, cationic starch with high degree of substitution and modified starch on the reversible thermochromism materials in anti-counterfeiting paper retention rate, and then determined the optimum dosage of retention agent in the slurry. According to the anti-counterfeit paper color value, the mechanism of reversible thermochromism paper was studied. The experimental results show that when the slurry with retention agent, the reversible thermochromism materials in the anti-counterfeit paper retention increased significantly. This suggests that retention agent in pulp fiber has played the role of bridge and link, thus ensuring the security of reversible thermochromism paper.

IIndoor photo has been widely used in products of shopping malls publicity, light box advertising, wedding photography, posters, engineering and landscape effect picture, digital photo album, art photo, antiquing canvas and window advertising. PP synthetic paper which was the most common indoor photo materials was selected as the research object, and it was printed by the photo printing machine. A series of experiments were carried out according to its printability. The main parameters of PP synthetic paper such as solid density, dot gain and relative contrast were tested, which provided a theoretical and practical basis for digitization of indoor photo.

The principle of offset printing is the graphic part lipophilicity and the blank part oleophobic hydrophilic. Based on the ink-water balance theory, this paper mainly discusses the base paper and the coating formulations of paper-based printing plate. In this paper the properties of the paper-based printing plate of the different coating formulations were detected and evaluated, meanwhile these plates were tested in the offset printing. Based on the detection of print quality, plate coating performance and the number of copies printed, the base paper and coating formulations of this plate was be determined. The results of this study for this plate have some significance in the actual production.

Paper based printing plate is one of printing plates used in eight mo octave or specifically offset printing machine. In the printing process, the printed plate wants to keep its shape by the pressure, the friction and tension. It needs to have good dimensional stability and good ink-water balance of coating. This paper discusses the influence of different coating formulations and coating process on the mechanical properties of paper-based printing plate. In this paper, the wet strength of paper-based printing plate of different formulations and different coating amount were tested. The study provided the theoretical basis for ink-water balance coating formulations of paper-based printing plate and the plate production.

Reversible thermochromism polyethylene sheet was prepared by the reversible thermochromism material and polyethylene particles using the method of melt blend. Then the color difference, test temperature and the mechanical properties of the reversible thermochromism sheet were tested. Using of electron microscopy in order to observe the details of the reversible thermochromism polyethylene sheet. Finally, this paper discusses the different amounts of reversible thermochromism materials on the polyethylene sheet relative color difference and mechanical properties. This study has some guiding sense over the application and the production of reversible thermochromism polyethylene sheet material.

Rare-earth europium complex is a UV photochromic materials. Fluorescent Polyethylene Sheet Material were prepared by the Rare-earth europium complex and polyethylene particles using the method of melt blend. Then the fluorescence of polyethylene sheet and the relative fluorescence intensity of the mechanical properties were tested. Finally, this paper discusses the different amounts of phosphor on the polyethylene sheet relative fluorescence intensity and mechanical properties. This study has some guiding sense over the application and the production of fluorescent polyethylene sheet material.

Ink-jet light-box cloth has been widely used in municipal engineering, supermarket, exhibition, hotel and other places, and played an indispensable role of advertising and decoration. There have been no unified parameters and standards for printing quality evaluation of ink-jet light-box cloth. To solve this problem, a group of researches were carried out according to its printability, which selected light-box cloth printed by inkjet. The parameters such as solid density, dot gain, relative contrast of the light-box cloth were tested and analyzed. Based on the results, the printing quality evaluation parameters were put forward. The purpose was to provide reference data for quality evaluation in light-box cloth printing industry.

Quaternary europium complex EuxGd(1-x)(POA)(TTA)2Phen were synthesized by doping no-fluorescent inert ions Gd3+with ligands of POA, α-thenoyltrifluoroacetone (TTA), and o-phenanthroline(Phen).IR spectra was studied , indicate that these complexes have similar structures, have bonded with the ligands.The fluorescent properties,the influence of fluorescent property by doping ions Gd3+were studied. The results showed that the doping ions Gd3+can enhance the fluorescence intensities, the best mole ratio of europium to gadolinium is 6：4.

The synthesis of reversible red-thermochromic materials when temperature range at re-spectively 36.0～39.5°C, 44.5～46.5°C, 51.0～53.5°C with the tetradecanol, hexadecanol and octa-decanol as corresponding solvents, letlacton compound of 3-diethylamino-7,8-phenyl-fluoran as procrypsis dye as color agent were studied in this paper. The chromic properties of reversible red-thermochromic materials by infrared spectrum technology were analyzed.Experiment shows, In the reversible thermochromic materials, the solvent to determine its color temperature, color agent is mainly to determine its color depth, procrypsis dye itself to determine its color and stability proper-ties. The optimal matchs of procrypsis dye, color agent and solvent are 1:4:30(tetradecanol), 1:3:40(hexadecanol), 1:2:20(octadecanol) respectively. This paper has theoretical and practical di-rection function in counterfeiting printing and packaging field of reversible thermochromic material.

Flexographic printing plate based on its soft characteristic has been widely used in the field of printing of corrugated box and plastic film. The system researches on the factors influencing the flexographic platemaking quality were carried out, including the different exposure time and the different development time affected the bulge image depth and plate thickness of the printing plate. The results provided a reliable reference data to obtain excellent printed matter, which determined the ideal platemaking parameters of the same type plate without doing any experiment.

Fluorescence falsification-resistant ink is one of the most widely used ink in packaging and printing industry. In this paper, europium complexes were synthesized by doping no-fluorescence inert ions Gd3+. IR spectra indicated that these complexes have similar structures, have bonded with the legends. The fluorescence properties indicated that the doping ions Gd3+ can enhance the fluorescence intensities, the best mole ratio of Gd3+ to Eu3+ is 1:9；At last, fluorescence falsification-resistant ink was prepared, the fluorescence ink showed the characteristic emission of Eu3+ , showed invisible in visible light and showed red fluorescence under ultraviolet light.