Mezzotint

Mezzotint is a printmaking process of the intaglio family. It was the first tonal method to be used, enabling half-tones to be produced without using line or dot based techniques like hatching, cross-hatching or stipple. Mezzotint achieves tonality by roughening the plate with thousands of little dots made by a metal tool with small teeth. In printing the tiny pits in the plate hold the ink when the face of the plate is wiped clean. A high level of quality and richness in the print can be achieved.
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Noun
1. print produced by an engraving that has been scraped to represent light or shade
(hypernym) print

(v. t.)
To engrave in mezzotint.
  

(n.)
A manner of engraving on copper or steel by drawing upon a surface previously roughened, and then removing the roughness in places by scraping, burnishing, etc., so as to produce the requisite light and shade. Also, an engraving so produced.
  

mezzotint /'medzoutint/
danh từ phương pháp khắc nạo bản in khắc nạo ngoại động từ khắc nạo; in theo bản khắc nạo
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MEZZATINTA. ACQUAFORTE. INCIDERE A MEZZATINTA