Explain the copper gold powder ink mixing method

Explain the copper gold powder ink mixing method

Gold powder ink mixing method. Gold powder ink and silver powder ink mixing method

Abstract: Gold oil, silver oil

The binder used in gold and silver ink is a special varnish. It is generally called gold or silver oil. The main components are oil, resin and organic solvent. The same materials as other inks, gold and silver ink. It is mainly composed of two parts of pigment and binder. In short, gold ink is made up of gold powder and gold oil. Silver ink is made of aluminum powder and silver oil.

1. Gold powder, silver powder

The pigment in the gold powder ink is gold powder, which is actually a powder made of copper and zinc alloy. The content of zinc in the gold powder is generally about 8% to 30%, and the zinc content is between 8% and 12%. The color of gold ink is reddish, and it is customarily called red gold. The color of gold ink with a zinc content between 20% and 30% is greenish, generally called green gold, which is called between red gold and green gold. For gold. In gravure printing, the gold ink is generally used for 800-mesh gold powder, and the surface of the gold powder particles is mostly coated with a surfactant, which can be well combined with the resin binder. Silver powder is actually aluminum powder, which is composed of 65% flake aluminum powder and 35% volatile hydrocarbon solvent. Aluminum powder pigments have a small specific gravity and are easy to float in liquids. What is used in the gravure silver ink is a floating silver powder having a floating ability in the 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 to modulate silver ink, which has a high metallic luster after printing.

2. Adjusting gold oil, adjusting silver oil

The binder used in gold and silver ink is a special varnish, generally called gold or silver oil. The main components are oil, resin and organic solvent auxiliary materials.

The binder of the offset ink should meet the following conditions:

1 Must have sufficient viscosity to combine well with gold powder or silver powder.

2 Transparency must be high and cannot affect the hue of gold and silver ink.

3 Gold powder ink or silver powder ink should have low acidity, otherwise it will cause chemical reaction of gold powder or silver powder.

4 Gold powder ink or silver powder ink should also have fast drying and fast fixing, to prevent the back side of the gold powder ink or silver ink printing.

3. Additives

Adding a small amount of bright paste or transparent yellow to the metal can enhance the ink retention and transferability of the gold ink; adding a small amount of red dry oil to the gold ink in winter can accelerate the drying speed; adding stearic acid amide surface activity when adjusting the ink The agent can fully wet, disperse and float the gold powder in the binder. Reduce paste and ink accumulation during ink transfer. Adding a small amount of bright light paste to the gold ink can dilute the gold ink while improving the brightness and viscosity, reducing the accumulation of gold ink and improving the fluidity.