Over Print Varnish Performance Program

As an initial screen test, the OPV will be applied to a certified printed media. The OPV will be evaluated for adhesion to the HP Indigo ink and visible orange peeling or mottling. After passing the initial screen test, the coating will be applied to specific test targets for evaluation of chemical and physical properties.

Once completed, a comprehensive report is then generated for each OPV/substrate combination and given to the supplier.

Evaluation Description

The OPV procedure evaluates coatings through the following tests:

• Peeling Tests
• Full Baseline Test
  • Mechanical Wear
  • Optical Tests
• Heat Resistance and Aging Tests (Optional)
• UV Light Resistance Performance (Optional)