17th-C Engraving Technique Giving Tonal Effects

This page is the CodyCross answer for the clue below from Spa Time, Group 805, Puzzle 2 (Meditation).

Question is: 17th-C Engraving Technique Giving Tonal Effects

and the answer is: MEZZOTINT

Word Meaning:

MEZZOTINT — A form of intaglio etching in which a metal plate is roughened evenly and then smoothed to bring out an image.

Definitions from Wiktionary.