Repeat: The blank records for cutting used to be cooked up, as needed, by the cutting engineer, using what Robert K. Morrison describes as a "metallic soap," containing lead litharge, ozokerite, barium sulfate, montan wax, stearin and paraffin, among other ingredients.
The blank records for cutting used to be cooked up, as needed, by the cutting engineer, using what Robert K. Morrison describes as a "metallic soap," containing lead litharge, ozokerite, barium sulfate, montan wax, stearin and paraffin, among other ingredients.