In previous posts we talked about two type of coatings (UV Coatings and Aqueous Coatings) that can be applied to a printed piece either as a flood coat or in a spot application. While UV Coatings and Aqueous Coatings are often referred to as varnishes, they are, in fact, made from polymers (i.e., plastics) and do not require extensive time to dry.
What are Varnish Coatings?
Varnish Coatings are made from organic resins combined with some form of a drying oil and solvent. In the drying process, the oils and solvent release VOCs (Volatile Organic Compounds) leaving a thin coat of hardened resin that forms a protective coating. Varnish coatings are less expensive, but are not as durable as UV or Aqueous Coatings.
Varnish Coatings, like UV and Aqueous Coatings, are available in gloss, matte, and satin finishes and can be applied in flood and spot applications. Varnish can be applied when ink is still wet (wet trapping) and will combine with the ink to create a unique finish. Or, varnish can be applied after the ink has dried on the piece (dry trapping).
Why use a Varnish Coating?
The primary advantage of using a varnish coating is it’s the least expensive coating option. Particularly, when budget is an issue, Varnish Coatings are a reasonable alternative to UV or Aqueous Coatings.
Any Disadvantage to Using a Varnish Coating?
Since Varnish Coatings require time to dry, they would not be the choice for projects on tight time schedules. For the environmentally conscious, the VOCs released during the drying process may be of concern. Also, varnishes tend to yellow as the age, which will impact the colors of the piece.
If you have any questions about Varnish Coatings, give us a call at 330-597-8560. We’re happy to help you get the most out of your printing project.
