Spot UV Varnishing
Traditional spot UV varnishing is applied as a liquid, then exposed to Ultra-Violet light which dries it instantly. This is what gives the area the high gloss finish that really 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 Ultra-Violet 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.