The brushing-out method of embossing glass is executed as follows. First coat the glass with asphalt um (Brunswick black). Now lay on the stencil, which is made of tinfoil. With a soft brush go over the stencil with soft soap: the latter is employed to keep the turpentine which is afterwards used from getting under the edges of the stencil. Now with a soft brush dipped in turpentine rub off the Brunswick black through the stencil; then take off the plate and wash with cold water. The work is now ready for the hydrofluoric acid to bite off.