The soft Charbonnel Black Etching Ground Caps also contain pitch resin and tallow. They are opaque and paste-like with a satin finish, and should be applied hot with a sponge or roller.
The hard Charbonnel Black Etching Ground Caps are wrapped in taffeta, which serves as a filter. Simply rub them on to pre-heated metal. They are very hard, opaque, matt and paste-like. Due to the black, matt appearance the needle marks are particularly visible.
Price per unit.