Polypropylene Pop Quiz

Solvent inks should not be a problem on non-topcoated polypropylene as they tend to bite into the surface better than water -based or UV systems. Depending on the ink system, a converter may be able to print on non-topcoated polypropylene without corona treating, laying down a primer or using a top coated product. We recommend a non-top- coated film to have a surface energy of more than 40 dynes for use with standard ink systems.