How to classify ink?

1. Fluorescent ink: fluorescent ink is made of fluorescent materials dissolved in

corresponding resins. The particles of fluorescent pigment are generally thicker,

and there are many kinds of binder. Different binder will produce different

fluorescence. When using fluorescent ink, it should be ensured that it has

sufficient concentration, and the ink layer on the print is thicker, so as to ensure

the satisfactory fluorescence effect. After screen printing, the fluorescent ink

has bright colors and good decoration effect. Under the action of visible light

and ultraviolet light, it can emit sparkling fluorescence.

2. Composite ink: after mixing two or more anti-counterfeiting inks in a certain

proportion, a composite ink with new performance can be developed.

If the ink formula is not fully mastered, it will be difficult to copy.

3. Light-storage and phosphorescent ink: Light-storage pigment is prepared

from some zinc sulfide, copper phosphor, calcium sulfide, bismuth phosphor

and other inorganic phosphors with phosphorescent effect. Inorganic fluorescents

emit light by crystals. If pressure is applied, the crystals will break and the luminosity

will be reduced. Therefore, screen printing is generally appropriate. The carrier of ink

and fluorescents are mixed when used. Phosphorescent ink is characterized by

absorbing light and emitting it with a certain wavelength in a certain time.

The pigment of this ink is zinc sulfide containing a small amount of impurities,

which is afraid of acid and alkali. Therefore, neutral resins such as cyclohexanone resin,

cellulose ester and ether are required. In addition, heavy metals, desiccants and dry oils

should not be added to the ink to avoid damaging the pigment substances.

The connecting material used shall be transparent and can pass through ultraviolet rays.

This kind of ink is mainly used for printing advertisements and signs. However,

if phosphorescent ink and fluorescent ink are mixed for anti-counterfeiting packaging

printing, it can achieve good packaging and anti-counterfeiting effects.

4. Special printing inks: printing inks are mainly composed of pigments, fillers, binders, etc.

The selection of pigment components is an important link to determine the color and

brightness of the printed products. Many manufacturers and ink factories have

customized special printing inks for each product, and the formula is

kept secret by the ink factory.

5. Photochromic ink: The photoinitiator in uv ink is a compound that is easy to be excited

by light. After absorbing light, it is excited to form free radicals, and the energy is transferred

to photosensitive molecules or photocrosslinking agents, which causes uv ink to undergo

photocuring reaction. UV ink has become a relatively mature ink technology, and its pollutant

emission is almost zero. In addition to solvent-free, uv ink has the advantages of not easy

to paste, clear dot, bright color, excellent chemical resistance and low consumption.