duotone

Double - tone half - tone : A colour plate printed slightly out of register to create a duotone effect.

双重 半色调: 用一颜色印版,作稍为不准的套印,从而产生双色调的效果.

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Double - black duotone: A duotone created from two black plates.

双黑双色调: 由两块黑版印制的双色调.

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