This Ox Gall by Talens Art Creation prevents beading and improves the adhesion of water-based paints on somewhat hydrophobic grounds. Can be added to the paint. Use sparingly to avoid strong absorption of the paint. Can also be used directly in order to degrease grounds other than paper with, for example, a cloth. Residues are then removed with a clean damp cloth or sponge. Composition: (synthetic) surfactant, water.