Spot UV Varnishing
Traditional Spot UV varnishing is applied as a liquid, and then exposed to Ultraviolet light which dries it instantly. This is what gives the area the high gloss finish that shines and enhances the brilliance of the ink colours.
Digital Spot UV varnishing gives a similar effect to the traditional way, although it is not in liquid form, nor is it dried using Ultraviolet light. It is an ultra-glossy plastic film that is (as with digital foil) over-printed directly onto the printed toner. The film is heated to around 105 degrees and then pressed onto the pre-printed sheet.