Introduction Of Printing Ink And Related Notes
Printing ink is used in the process of forming graphics and text information material, so ink in the printing role is serious, it directly determines the print image halftoning, color, clarity and so on. In printing we need to understand the composition of ink and the classification of inks.Printing Ink
Ink should have a bright color, good printing adaptability, the appropriate drying speed. In addition, it should have a certain degree of solvent resistance, acid, alkali, water, light, heat and other applications of indicators. With the printing, paper and other requirements of more and more high, the ink requirements of the technical conditions have also improved. such as modern high-speed multi-color printing presses and a variety of rotary printing presses, require ink in a few seconds or even faster drying speed. Glass card and gold, silver card, coated paper requires a bright ink. The printing of plastic film, requires a good combination of plastics membrane, or to maximize the adhesion of plastic film adhesion ink. Printing special print, require the use of photosensitive inks and so on.
A binder is a viscous fluid. As the name implies, it is a link. In the ink industry, is the powdery pigments and other substances, mixed together, so that it is dispersed after grinding, it is possible to form a certain degree of fluidity of the paste-like adhesive.Printing Ink
The binders are part of the fluid in the ink. The fluidity of the ink (sex), viscosity (sex), dryness, and printing performance, and so on, depends on the binders. Therefore, the binders are the basis of quality of ink. A variety of vegetable oils, most can be used to make ink binders. Some animal oils and mineral oils are also used in ink binders. Solvents and water are no exception. The emergence of various resins in recent decades has expanded the source and variety of binders. Filling (filling) material is white, transparent, translucent or transparent powder material, but also the solid part of the ink. mainly filling effect. In the ink is the filling pigment part. Appropriate use of some fillers, not only to reduce the pigment dosage, reduce costs, but also adjust the nature of ink, such as dilute thick, flow and so on. It also improves the flexibility of formula design.Printing Ink
The ink is often used in ethanol, isopropyl alcohol, butanol, propanol, Butanone, Ethyl Acetate, butyl acetate, toluene, xylene and other organic solvents. Although most of these organic solvents will be removed after drying, the remainder will still cause harm to the human body. In particular, the ink area is larger, thick holdout of printed matter, its residual solvents more, in the use of the release of toxic substances polluted air, endanger people's health. Ink pollution is a major problem in pigments. These pigments are very small particles, strong adsorption capacity, including lead, chromium, cadmium, mercury and other heavy metals, all have certain toxicity. Take lead as an example, a page of color newspaper about 2000 micrograms of lead, lead is the only trace element of the human body does not need, it is stable, not degradable, inhibit the formation of blood cells. When the body of lead accumulation to a certain extent, there will be mental disorders, nightmares, insomnia, headache and other chronic poisoning symptoms, serious fatigue, anorexia, nausea, abdominal distension, abdominal pain, diarrhea and so on. Lead can also be through the blood into the brain tissue, causing brain damage. According to the study, the absorption of lead by children is several times higher than that of adults, and lead toxicity has a great influence on children's intelligence. In addition, the use of a large number of benzene-containing diluent, with toxicity, pungent odor, in the use of easy to pollute the air, long-term inhalation will affect the central nervous center of the brain, the human health caused great harm.Printing Ink