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Colorants used in security inks are special pigments that radiate in the UV region or IR region. Obtained pigments can be from valuable rare earth elements or they can be organic based. Organic-based pigments are generally insoluble in water, which limits their use. For this purpose, an organicbased UV-radiating pigment was synthesized and made water-soluble by forming its salt. With the obtained salt-formed pigment, inkjet ink that can be used in counterfeiting was applied and its printability and resistance properties were determined. In this study, 1, 3, 6, 8-pyrene sulfonic acid tetrasodium salt was synthesized and water-based inkjet inks with hydroxy ethyl cellulose binder were produced. The prepared inks were printed on the paper surface. The color and gloss of the prints obtained were measured both in the visible region and in the UV region. Its optical properties were detected by UV spectroscopy. Strength properties such as light fastness, nitro resistance, alkali resistance, acid resistance, rub resistance, drying time, adhesion and dry film weight of the prints were determined. As a result; Inkjet ink with 1, 3, 6, 8-pyrene sulfonic acid tetrasodium salt was produced and it was concluded that it has good resistance properties. [ABSTRACT FROM AUTHOR]

In this study, rose oil was encapsulated with stearic acid substituted polyvinyl alcohol macromolecule. In the first part of the study, stearic acid substituted polyvinyl alcohol macromolecule was synthesized and its chemical structure was elucidated by ATR-FTIR and ¹HNMR. Then, rose oil was encapsulated using this obtained polymer. The chemical structure of the obtained capsules was made by ATR-FTIR, and dimensional analysis was done by scanning electron microscope (SEM). After the obtained capsules, a paper coating formula was prepared and coated on 80 g/m² paper. The resulting scented papers were printed using the screen printing technique. The color, gloss, and deformation of the capsules on the surface of the printed and unprinted papers were determined by spectrophotometer, glossmeter and SEM. As a result, it was determined that the synthesized polymer could encapsulate the rose oil and the papers using these capsules could be printed without deformation. [ABSTRACT FROM AUTHOR]

Papers are raw materials with high flammability. Some of the products produced in the printing industry are used in places requiring high heat resistance. High-tech papers can be produced by adding a flame retardant to the paper coating formulation or pulp. In this study, it is aimed to prepare polyvinyl alcohol (PVA)- zinc borate / melamine / zinc borate-melamine paper coating formulations and to produce flame retardant paper by coating on paper. For this purpose, primarily zinc borate is produced by boric acid and zinc carbonate reaction. In the second part of the study, four different coating formulations were prepared by adding zinc borate, melamine and their double mixtures to the main formulation, where PVA polymer matrix was used as binder, and coatings were made on an 80g/m2 paper surface. Limiting oxygen index (LOI), gloss, color, surface energy and contact angles properties of the produced papers were determined. Offset printing was done onto coated papers with IGT C1 test printing machine. All produced flame retardant papers have good printability characteristics. [ABSTRACT FROM AUTHOR]