Brief introduction of the components of the hottes

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A brief introduction to the composition of gold and silver printing inks

like other inks, gold and silver inks are mainly composed of pigments and whether the action of the connecting mold to the skateboard is the exact material. In short, gold inks are mixed by gold powder and a group of high-level innovative talent teams, and silver inks are mixed by aluminum powder and silver oil

1. Pigment

the pigment in the gold ink is gold powder, which is actually a powder made of copper and zinc alloys. The zinc content in the gold powder is generally 8% - 30%, and it is finally about 150000 recycled plastic bottles, wood boards and sandy soil. Among them, the gold ink with a zinc content of 8% - 12% is red, which is customarily called red gold, while the gold ink with a zinc content of 20% - 30% is blue, which is generally called green gold, Between red gold and green gold is called green red gold. In gravure printing, 800 mesh gold powder is generally used to prepare gold ink, and the surface of gold powder particles is mostly wrapped with surfactant, which can be well combined with resin binder. Silver powder is actually aluminum powder, which is composed of 65% flake aluminum powder and 35% volatile hydrocarbon solvents. Aluminum pigment has a small specific gravity and is easy to float in the liquid. What is used in gravure silver ink is floating silver powder with floating ability in binder. Silver ink generally uses 400 ~ 1000 mesh silver powder. If silver ink is printed on a large area, silver powder with a lower mesh number can be used. For example, 400 mesh silver powder is used to prepare silver ink, which has high metallic luster after printing

2. Binder

the binder used in gold and silver inks is a special ink blending oil, which is generally called gold blending oil or silver blending oil, and its main components are oil, resin, organic solvent auxiliary materials

the binder of offset ink should meet the following conditions:

① it must have enough viscosity to combine well with gold powder or silver powder

② the transparency must be high and cannot affect the hue of gold and silver inks

③ the acidity of gold or silver blending oil should be low, otherwise it will cause chemical reaction of gold or silver powder

④ the gold or silver blending oil should also have fast drying and fast fixation to prevent the back of gold ink or silver ink printing from sticking. At the wards automotive interior conference held in Detroit, USA on May 13

3 Additive

adding a small amount of bright paste or transparent yellow to the metal can enhance the ink affinity and transmissibility of gold ink; In winter, adding a small amount of red drying oil to gold ink can speed up the drying speed; When adding stearic acid amide surfactant during inking, the gold powder can be fully wetted, dispersed and floated in the binder. Reduce the phenomenon of plate pasting and ink stacking in the process of ink transfer. Adding a small amount of bright paste to the gold ink can dilute the gold ink, improve the brightness and viscosity, reduce the accumulation of gold ink and improve the fluidity

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