3695. Electrotyping on Wood

3695. Electrotyping on Wood. Dip the wood in melted wax, then brush over with black-lead until polished; insert a wire of copper, and see that it is also covered with the plumbago, and in contact with that already on the wood; now attach to the pole of the battery, and immerse in the solution of sulphate of copper. The battery should not be too strong.