标准编号：ISO 20654:2017
中文名称：图形技术 斑点颜色的测量和计算
英文名称：Graphic technology — Measurement and calculation of spot colour tone value
发布日期：2017-08
标准范围
This document defines a metric for assessing intermediate tones of a spot ink. This method for the calculation of Spot Colour Tone Value (SCTV) produces approximately uniform visual spacing of tones between substrate and solid. It can be calculated from spectral reflectance or colorimetric measurements of the solid ink, substrate and one or more patches of intermediate tones to be measured.
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