is a measure of the solvency of a hydrocarbon; the higher the kauri-butanol value, the greater the general solvent power of the hydrocarbon. Under test conditions prescribed in test method ASTM-D-1133, a hydrocarbon sample is added to a standard solution of kauri gum in butyl alcohol (butanol) until sufficient kauri gum precipitates to blur vision of 10-point type viewed through the flask. When used in varnish, lacquer, and enamel formulations, a hydrocarbon diluent with a high kauri-butanol value dissolves relatively large quantities of solids.