Schmincke Oxgall The Schmincke goal, to supply the very best artists' colours, is a pleasure for all who are involved - they are motivated by the artists' satisfaction. Those who donate their valuable time to creative activities usually wish to use the best possible material. Schmincke wants to contribute to a beautiful colourful world - with the best artists' supplies. This complements founding-forefathers motto: "MELIORA COGITO - I strive for the best!"About this product: Natural wetting agent for water-colours and gouache colours; Improves flow; Decreases the surface tension of the colours diluted with water; Use sparingly; Dissolved oxgall tends to flocculate during a long period of storage - this has no influence on the product`s handling.