CONTAINED IN VOL. 06.03, 2017 Specifies shellac varnish consisting of a solution or 'cut' of a specified type and grade of dry lac resin in specially denatured alcohol. Ninety-five percent (190 proof) ethyl alcohol, specially denatured according to Formula No. 1 of the Alcohol, Tobacco, and Firearms of the Treasury Dept., is the solvent most commonly used.