The printing of plastic film is different from the printing of paper. In addition to the pretreatment mentioned above, another problem is that the surface of the film is smooth and the ink cannot be penetrated. Although the surface of the paper looks smooth, but in fact its surface is not smooth, can let the ink infiltration, which is conducive to the rapid drying of ink film, is also conducive to the bonding of ink and paper surface.

When we choose ink, we should consider the following factors.
(1) thermal distortion point and heat resistance if you choose drying ink. To consider the maximum drying temperature of ink and plastic can withstand the temperature is appropriate.

(2) solvent resistance to plastic film has a certain solubility of the solvent, help ink and plastic film bonding, but if the effect is strong, it is possible to reduce the mechanical properties of the film.

(3) plasticizers and other additives Some plastic films contain a certain amount of plasticizers and other additives, these materials can often migrate to the surface of the plastic film and eventually make the ink soften and break the bond.

(4) other factors of plastic film rigidity, brittleness, dimensional stability and coefficient of expansion and other factors will affect the durability of ink bonding.