Yellow wax or ceresine 3 ounces

Spermaceti.......... 1 ounce

Oil of turpentine..... 11 ounces

Asphaltum varnish.. . 1 ounce

Borax.............. 80 grains

Frankfort black...... 1 ounce

Prussian blue........ 150 grains

Melt the wax, add the borax, and stir until an emulsion has been formed. In another pan melt the spermaceti; add the varnish, previously mixed with the turpentine; stir well and add to the wax; lastly add the colors.