1. The surface energy of the ink is low, which ensures good wetting ability to the plastic film and good adhesion fastness of the ink film layer.
2. After the ink is formed into a film, it has good flexibility and can be resistant to rubbing.
3. Choose inks that are light-resistant, heat-resistant, oil-resistant and chemical-resistant.
4. The ink has strong tinting power and bright colors.
5. The ink viscosity should be low, easy to use and cheap.
