electro-tint

from The Century Dictionary.

• noun Same as electrotinting.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Fine Arts) A style of engraving in relief by means of voltaic electricity. A picture is drawn on a metallic plate with some material which resists the fluids of a battery; so that, in electro-typing, the parts not covered by the varnish, etc., receive a deposition of metal, and produce the required copy in intaglio. A cast of this is then the plate for printing.