The printed surface is still fragile and, if left unprotected, cannot withstand the stress of a floor covering. It must be protected from scratches, moisture and dirt by a transparent coating of resin or lacquer.
Various technologies are available for applying the resin or lacquer. Resin can be chemically cured by pressure and temperature in a short cycle press. Varnish layers are applied with a roller coating machine. Usually the protective coating is built up from several layers.