William Norman Brown, Handbook on Japanning: 2nd Edition (1913)
“ The shellac varnish for the japan ground is best prepared as follows: shellac 11/4 lb., methylated spirits 1 gallon. Dissolve in a well-corked vessel in a warm place and with frequent shaking. After two or three days the shellac will be dissolved. It is then recommended to filter the solution through a flannel bag, and when all that will come through freely has done so the varnish should be run into a proper sized vessel and kept carefully corked for use. ”
