In printing, a means of increasing the tonal range of printed halftones by printing with two specially-prepared black halftone plates. Not to be confused with a double halftone. Also called a double-black duotone.
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In printing, a means of increasing the tonal range of printed halftones by printing with two specially-prepared black halftone plates. Not to be confused with a double halftone. Also called a double-black duotone.