Engraved work that is to be subsequently filled is executed in the usual way, the cuts being kept as clean as possible. Then take a stick of the best black sealing-wax, break it into small pieces, and place in a 4-oz. bottle with stopper, if possible, pouring on sufficient pure spirit of wine to dissolve into a thick paste; then add more spirit to make it run, but not too freely - something like cream. To use, dip into the solution a steel tracer or point, and with the side of the point fill the cuts and leave to set all night. If a number of knife-handles are to be finished, rig up a small lathe carrying a linen polishing dolly, made by cutting out into circles, from 6 in. to 12 in. in diameter, fifty or more linen sheets, and screwing them tightly in the centre on a mandril. The speed of the lathe causes these to become erect, and the ivory handle is lightly applied as the dolly revolves, aided by a little whiting to grip the superfluous wax on the surface of the handle.