Glue sizing, followed by oil painting, is the traditional method of preparing a canvas for oil painting. The size is made by dissolving 1 part Rabbit Skin Glue to 10-15 parts cold water. Soak until all the water has been absorbed by the glue to a porridge consistency (1 hour or overnight). Then stir and heat gentle in a double boiler until the glue dissolves (do not boil the glue). Apply when still warm (not hot) with a stiff brush onto stretched linen or cotton duck. Size acts as a penetrating liquid to fill the pores of the canvas and to isolate the fabric from subsequent applications or primer and oil paint. Rabbit Skin Glue sizing should not be used under Acrylic Gesso or Art Spectrum Oil Prime. This product is marked as a dangerous/hazardous item. Due to this fact, extra freight charges will be calculated upon check out.