What is "tint tool"

Tint \Tint\, n. [For older tinct, fr. L. tinctus, p. p. of tingere to dye: cf. F. teinte, teint, It. tinta, tinto. See Tinge, and cf. Taint to stain, a stain, Tent a kind of wine, Tinto.] A slight coloring. Specifically:

1. A pale or faint tinge of any color.

   Or blend in beauteous tints the colored mass.
   --Pope.

   Their vigor sickens, and their tints decline.
   --Harte.

2. A color considered with reference to other very similar colors; as, red and blue are different colors, but two shades of scarlet are different tints.

3. (Engraving) A shaded effect produced by the juxtaposition of many fine parallel lines.

   Tint tool (Eng.), a species of graver used for cutting the parallel lines which produce tints in engraving.