Art Spectrum Glue sizing and oil priming are the traditional methods of preparing a canvas for oil painting.

The size is made by dissolving 1 part Rabbit Skin Glue to 13 parts cold water. Soak overnight or until all the water has been absorbed by the glue. Heat gently in a double boiler and stir until the glue dissolves (do not let the glue boil). Apply while still warm with a stiff brush. The size acts as a penetrating liquid to fill pores of the canvas and isolates the fabric from subsequent applications of primer and oil paint preventing canvas rot.