The wide range of inks and substrates used in package printing makes ink/substrate compatability more of a challenge.

By Jean-Marie Hershey

Non-porous substrates, such as films and foils, must have their surface energies altered in order for proper ink adhesion to occur. Plastic substrates can be modified to increase the surface energy of the material. Corona treatment alters the static charge of a material’s surface, making it more receptive to the application of inks, coatings, and adhesives.