The hottest future printing ink development trend

2022-07-24
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Future development trend of printing inks

starting from the fineness and purity of printing inks

as we all know, the fineness and purity of printing inks are very important to the quality of printed products. To print high-quality products, we must have high fineness and high purity ink as a guarantee. Therefore, improving the fineness and purity of ink is an important part of the research on new ink

ink fineness refers to the size of pigment (including filler) particles and pigments in ink. Most of the enterprises are small and medium-sized enterprises. The uniformity of filling materials in the binder. Therefore, the ink fineness not only affects the quality of printing, but also affects the printing plate resistance. In the process practice, the color printing products are printed with grain plate. The field plate contains small negative words and lines, which is easy to cause quality problems such as paste and dirty during the printing process. If it is not carefully checked and analyzed, it is likely to fall into the wrong operation, thinking that the ink consistency is inappropriate, the viscosity is too high, the ink quantity is too large or the pressure is too large, and blindly make some wrong adjustments. As everyone knows, the real reason lies in the poor ink fineness

ink fineness is directly related to the properties of pigments, fillers and particle sizes. Generally, the ink made of inorganic pigments (excluding carbon black) has low fineness and coarse particles, which is closely related to the ink rolling process. The more times the ink is ground in the rolling process, the finer the ink particles, the larger the contact area between the pigment particles and the binder, and the better the printing performance. Obviously, the fineness of ink is closely related to the quality of printed matter. Take the printing plate as an example. If the proportion of ink particles and dot area is close, it is easy to make dots empty or fluffy, and even lead to printing defects of rough dots. Therefore, the higher the ink fineness, the clearer, fuller and more powerful the dots on the printed matter

in addition, the better the fineness of the ink, the greater its concentration, the stronger its coloring power, and the higher the printing quality of the product. On the contrary, the ink fineness is low, the pigment particles are coarse, the friction coefficient is large in the printing process, and the printing plate's printing resistance is low. In addition, the ink with coarse particles is also prone to paste, ink accumulation, uneven ink transmission and ink distribution during printing. The fineness of the ink can generally be observed and judged by the naked eye, that is, if the surface scraped by the ink knife shows a smooth and uniform visual effect, it indicates that the fineness of the ink is good. If the scraped table 1 Power supply: small or granular rough layer on ac220v400w surface indicates poor fineness of the ink. In addition, you can use coated paper with a little ink, and then use another piece of paper to polish the ink layer. If the ink layer is still very glossy until it is very thin, it indicates that the ink fineness is good. If there is a trace on the ink layer, it is obvious that the trace is caused by the coarse particles of pigments and fillers in the ink, which indicates that the ink fineness is not good enough

of course, the above judgment is only based on experience, and the accuracy of judgment has certain limitations. In order to realize standardized and data-based judgment, only by relying on the fineness meter to determine the size of pigment particles, can the fineness of ink be accurately detected. The specific method of measuring the ink fineness with the fineness meter is to dilute the sample ink to a certain extent, place it in the deepest part of the fineness meter, and then move the groove (keep a constant speed) to the shallowest place with a scraper. The size of the ink particles can be seen at the scales on both sides of the groove. In addition, the size of ink pigment particles can also be observed with a microscope

characteristics of nano ink

nanotechnology is a new and high technology, and the research object is mainly nano materials. Nano materials are the current high-tech products. Now they have developed rapidly and began to penetrate into various fields. They have successfully obtained a variety of application materials with special properties, which can be described as a new milestone in the history of material development. Based on the various characteristics of nano materials, the application of nano materials to the ink system will bring great impetus to the ink industry. Experiments show that the absorption of light waves by nano metal particles is different from that of ordinary materials. Nano metal particles can absorb all light waves and make themselves appear black. At the same time, nano metal particles can also scatter light. Using the characteristics of nano metal particles, adding nano metal particles to black ink can produce nano black ink, which greatly improves the purity and density of black ink. In addition, semiconductor nanoparticles exhibit certain optical absorption properties due to the significant quantum size effect and surface effect

studies show that after chemical modification on the surface of nano semiconductor particles, the medium around the particles can strongly affect their optical properties, which shows that the absorption spectrum is red shifted or blue shifted. Experiments show that the light absorption edge of CdS nanoparticles has a significant blue shift, while TiO2 nanoparticles have a large red shift. Accordingly, if they are added to yellow ink and cyan ink respectively to make nano ink, the purity of yellow ink and cyan ink can be greatly increased. Printing color prints with nano ink added with specific nano particles can enrich the layers of prints, make the tones more distinct, and greatly enhance the expressiveness of image details, so as to obtain high-quality prints. Nowadays, with the help of high and new technology, various components in the ink (such as resin, pigment, filler, etc.) can be made into nano level raw materials. In this way, due to their high fineness, they have good fluidity and lubricity, and can achieve better dispersion, suspension and stability. The amount of pigment is small, the covering power is high, the gloss is good, the resin particle size is fine, the film formation is continuous, smooth and uniform, and the film layer is thin, so that the printed image is clear. If used in UV ink, the curing speed can be accelerated. At the same time, due to the uniformity of filler, the domestic research on metal rubber materials started late and dispersed, so as to eliminate the shrinkage and wrinkling of the ink film

in the printing ink of glass ceramics, if the composition of inorganic raw materials is nano fineness, a lot of raw materials will be saved and more exquisite high-quality images can be printed. Nanotechnology has brought a great change to the ink manufacturing industry in terms of pigments, making the ink no longer rely on chemical pigments, but choose appropriate volume of nano particles to show different colors. For example, the nano particles of TiO2 and SiO2 are white, Cr2O3 is green, and Fe2O3 is brown. Inorganic nano materials such as Al2O3 have good fluidity. If they are added to the ink, the wear resistance of the ink film can be greatly improved. Nano carbon ink is conductive and has a good shielding effect on static electricity to prevent electrical signals from being interfered by external static electricity. If it is added to the ink, it can be made into conductive ink, such as large capacity integrated circuits, modern contact panel switches, etc. In addition, if AG is made into nano scale instead of micro scale Ag in conductive ink, 50% of Ag powder can be saved. This conductive ink can be directly printed on ceramics and metals, and the ink film is thin, uniform and smooth. If Cu and Ni materials are made into 0.1 ~ 1 μ M, which can replace precious metals such as palladium and silver. Therefore, the combination of nanotechnology and anti-counterfeiting technology will open up another vast world of anti-counterfeiting ink.

in addition, some nanoparticles have light-emitting groups, such as "one n ≡ n one" nanoparticles can emit light by themselves. The printing products printed with the ink added with such nano particles can be recognized by the human eye without the irradiation of external light sources, and can also achieve a good first-line anti-counterfeiting effect for anti-counterfeiting printing; It is used for large-scale outdoor advertising spray painting or reading at night. It does not need the help of external light sources, which not only saves energy, but also greatly facilitates users

in addition, because nano particles have good surface wettability, they are adsorbed on the surface of ink pigment particles, which can greatly improve the lipophilicity and wettability of the ink, and ensure the stability of the whole ink dispersion system, so the printability of nano ink with nano particles is greatly improved. It is believed that with the further development of nano material technology, more nano materials with different characteristics will be recognized and utilized by people. Applying these nano materials to ink manufacturing can obtain special inks with different uses, which can be used for confidential document printing, various anti-counterfeiting printing and various handicrafts printing, and can achieve extraordinary results

in electrostatic copying, magnetic nano toner is used to replace the widely used non-magnetic toner, which can eliminate the need to add ferromagnetic particles into the non-magnetic toner as a carrier, so as to make a single component copy developer, which can save raw materials and improve the copy quality. As for the source of nano materials, in fact, there are many methods to obtain nano materials, including high-temperature sintering (such as the sintering technology of carbon nanotubes), precipitation, high-temperature water dissolution, chemical vapor condensation and modern plasma energy polymerization

to sum up, the fineness and purity of ink are very important to the quality of printed matter. To print high-quality products, we must have fine and high-purity ink as a guarantee. Therefore, it is of great significance for the printing field to deepen the understanding of nano ink, develop higher quality nano new material industry and rapidly develop nano ink

nano anti-counterfeiting ink

the application of nano technology in the development and production of ink has made gratifying achievements, especially in the application of anti-counterfeiting ink. The nano anti-counterfeiting printing ink developed by combining nano technology and anti-counterfeiting technology not only has good printing effect, but also can further improve the anti-counterfeiting effect and anti-counterfeiting performance. For example, in view of the poor light resistance of fluorescent anti-counterfeiting inks and the fact that the anti-counterfeiting mechanism has been decoded and the anti-counterfeiting function has been lost, the performance of the nano anti-counterfeiting inks successfully studied by Guangzhou University has reached a satisfactory level in terms of reliability, safety, stability and aging resistance. At present, the product has been used in high-tech fields such as outer packaging, ticket anti-counterfeiting and infrared sensors

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