I. ˈtōnə(r) noun
( -s )
: one that tones: as
a. : an organic pigment that contains no inorganic pigment or inorganic carrier : a full-strength organic pigment — see dye table I (under Organic pigments ); compare lake IV 1b
b. : one that tests the quality and color of paints
c. : a chemical solution capable of converting a silver photographic image to a colored image
II. noun
1. : astringent b
skin toners
2. : a substance (as a thermoplastic powder) used especially in photocopiers and laser printers to develop a latent xerographic image on a piece of paper