PETROLEUM WAX IN IMPREGNATED PAPERS

This method determines quantitatively the total amount of petroleum wax in impregnated papers, including both “dry waxed” and so called “waxed paper” constructions. The wax is extracted with hot trichloroethane, which is then removed by evaporation, and the wax weighed.

The method is not intended for wax-sized papers, because these generally contain such quantities of rosin or other soluble matter as to impair its accuracy. Neither is it intended to determine surface wax on waxed paper or