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.
- What are the requirements for colorants in inks? 2023-04-28 53
- What are the factors affecting ink oxidative conjunctival drying? 2023-04-28 55
- What factors affect the low adhesion fastness of plastic gravure printing ink? 2023-04-27 65
- What are the advantages of printing glass with a uv flatbed printer? 2023-04-27 39
- How to control the viscosity of water-based ink? 2023-04-26 31
- What are the competitive advantages of uv inks? 2023-04-26 36
- Is the viscosity of water-based ink important? 2023-04-25 41
- What factors determine the shelf life of uv inks? 2023-04-25 39