Pad printing ink is similar to screen printing ink, but screen printing ink will not evaporate quickly, otherwise the ink will dry out in the screen frame. On the contrary, the printing ink needs to have a high volatility function, so that the ink can easily stick to and leave the glue head. In addition, pad printing ink will be thinner than screen printing.

The components of pad printing ink include:

Resin (20%)-used to form thin inks and combine colorants. Different resins should be matched with different drying methods.

Pigment (17%)-brings color to the ink and becomes opaque.

Solvent (60%)-allows resin pigment composites to be printed on objects. Pad printing requires the use of more volatile solvents, but to choose the most suitable, it depends on the other components in the ink. Because no solvent is multi-functional, it usually needs to be used in combination.

Additives (3%)-can make the ink smoother and increase the stability of the pigment. The lack of additives will make the ink easy to crack, less tension and pigment separation.

Essential features of pad printing ink

Pad printing inks have different construction methods than baking paints, so to match their unique construction methods, their inks also have different paint characteristics. The main features are as follows:

1. Strong adhesion (to the printing surface).

2. Good fluidity, some inks are in the form of paste and cannot flow in the oil cup or oil basin.

3. When the thinner water evaporates as the ink is picked up, it can exert its viscosity.

4. The pigment should be fine, so as to make the gloss more obvious and reduce the transparency. The thickness of normal ink is 7 microns in general printing.

5. Ink gloss cannot be changed by the influence of the printed surface.

6. To dry quickly but still not change its viscosity.

In order to obtain the ideal printing effect, must use the printing ink. Because the amount of ink transferred by pad printing is small each time, the color content of the ink is required to be high. The characteristics of the ink are as follows: easy to operate; long storage period; does not harm the health of the body, protect the environment; easy to clean; good adhesion, the material does not require pretreatment and post-treatment; large color concentration; good hiding and fine ink; short filament , Not brushed; quick-drying.