Current situation and development of water-based i

The current situation and development of water-based ink in carton packaging industry

quick drying agent ink drying speed may be slow due to different resins selected by ink manufacturers or too fast machine speed in the process of use. Accelerating the drying agent can adjust the drying speed of ink to meet the requirements of printing machine speed and improve production efficiency. Its use proportion is 2~3%. Slow drying agent can inhibit and slow down the drying speed of ink, play a moisturizing role, prevent the ink from drying on the printing plate or roller, and reduce the occurrence of printing failures such as blocking and pasting. The use proportion is between 1% and 2%

application scope of water-based inks after introducing the structure and types of water-based inks, let's talk about some important factors affecting the printing quality of water-based inks. In carton printing, ink transfer and ink volume control are undertaken by the corrugated roller. Therefore, the corrugated roller must be selected according to the requirements of the product. The number of corrugated roller lines is about four times that of the number of printed lines, so as to obtain better printing clarity and resolution

fineness refers to the size of toner particles in ink, which is completed in the process of producing ink pastes. It is a key quality index. Whether the color paste production process is scientific and meticulous plays an absolute role in the quality of ink. It is better to add dispersant and wetting agent in the production of color paste. Generally, the fineness of ink is required to be between 10~25 M. too fine or too large will affect the fluidity and rheology of ink

viscosity refers to the consistency of ink and is an indicator of ink flow. Viscosity is too large, resulting in poor liquidity and slow drying; Low viscosity ink has good fluidity, fast drying, thin ink layer and less ink consumption. Generally, the viscosity of ordinary ink is 50 \ ~65\/25 ℃ (coated with 4cup), and the viscosity of high-end ink is controlled at 25 \ ~35\/25 ℃ (coated with 4cup). If the viscosity of ink is low, the toner content is required to be high; On the contrary, the toner content is low. Because the viscosity directly affects the transferability of ink and the quality of printed matter, it is very important to control the viscosity of ink. In the printing process, low viscosity will cause light color, and high viscosity will cause dirty version, paste version and other phenomena, so please add transfer agent when it is difficult to control, which can improve the transfer effect and increase the bright color and three-dimensional sense

tips for using water-based inks

■ do not mix water-based inks with solvent inks. In the process of use, add water appropriately. When it is really necessary to adjust the viscosity or drying speed, add an appropriate amount of alcohol or ester and other additives

■ before use, it should be stirred evenly, then poured into the ink tank, and the viscosity can be adjusted appropriately with water before use. If it is not used, the packaging barrel should be covered, and the ink cannot volatilize in nature

■ before use, check all technical indicators, especially whether the hue meets your own requirements. If the hue deviation is large, please inform the ink manufacturer to make appropriate allocation, so as to avoid disputes between both parties due to hue error

■ in the printing process, due to the volatilization of water, the ink will be affected. Otherwise, the experiment will not be ideal. The original viscosity and pH value need to be tested frequently. When necessary, pure tap water or pH stabilizer should be added appropriately

■ the ink left on the printing equipment after printing should be washed with clean water, and the ink on the print roller of the printing machine should be cleaned with cleaning agent to serve the next printing

get out of the misunderstanding of using water-based inks

not all users of water-based inks can we find that the pressure solid gold also closely follows the development trend of the household appliance industry. There are different structures in the testing machine to understand the viscosity principle. Many people will have such a misunderstanding that a high viscosity of ink is a good ink. You can add a lot of water and print more cartons to reduce costs and improve efficiency. In fact, the author believes that it is very unrealistic and unscientific to blindly buy high-grade ink without considering the performance of production equipment, and to think that high-grade ink can print high-quality prints

the simplest test standard for high-grade ink is whether there is color loss, but it is not particularly accurate to think that the ink that does not lose color is high-grade, or that high-grade ink does not lose color. Because the problem of color loss is still a problem all over the world so far, no small ink factory that does not adjust the breakpoint ratio can make ink without color loss. If the ink is required not to lose color, the only way is to use offset ink printing method, either a layer of varnish or a layer of PVC

the printing effect of a printed matter is affected by many factors, such as printing press, ink, cardboard, technical operators and climate change. However, once the end customer reports that there is a problem with the carton, the carton factory usually talks with the ink factory at the first time. The author believes that in fact, we should find reasons in many aspects when encountering this kind of problem. It is really the ink itself that has quality problems that should be punished by economic means

carton printing plants are relatively tight on cost control and desperately try to lower the ink price. At present, the ink price is low and the profit space is relatively small. Generally, ink factories are unable to cope with reducing costs. There is no time and sufficient funds to develop products, improve product quality and better serve the carton factory. In fact, most of the production costs of carton factories are on paper or cardboard

the author believes that the cost of paper is the key point. Ink and wash accounts for less than 0.01% of the cost of a carton product. It is not worth spending so much time and energy dealing with the price of ink and wash. In addition, in order to promote the service brand, some ink factories send computer color matching machines to the carton factory. The carton factory thinks it is a treasure, which actually increases the production cost of the carton factory invisibly

because it is not omnipotent color matching, as far as the author knows, except for the paint baking and computer color matching machine in the automotive high consumption industry, other industries rarely buy it. Whether the carton industry, as a low-value consumables, must be equipped with computer color matching machine and increase costs and expenses, it is worth considering