BS ISO 20654:2017

This standard BS ISO 20654:2017 Graphic technology. Measurement and calculation of spot colour tone value is classified in these ICS categories:

• 37.100.01 Graphic technology in general

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.