It improves the qualities of resistance to ageing of acrylic colours, unifies the differences in brightness of the picture and increases the depth of colour. When the colour is applied thickly, it is advisable to wait 1-2 weeks before varnishing work. Solvent-based acrylic varnish is covering and non-yellowing. They offer a perfectly taut film, that is flexible and indelible. They have a feature of a guaranteed possibility of restoration work.