Royal Talens Ox Gall for watercolour

75 ml. Purpose: Cleans grease from paint base to achieve a better, even paint layer Properties: Can be used pure (paint base is washed off) or mixed into the paint (small percentage) Prevents the paint from smearing from the base Provides better adhesion to water-repellent bases Excessive use causes the binder in the paint to penetrate too far into the bottom layer