GSO ISO 20654:2021

Gulf Standard   Current Edition
· Approved on 01 July 2021 ·

Graphic technology — Measurement and calculation of spot colour tone value

Metrology Sector
Graphic technology in general
Including proof corrections

GSO ISO 20654:2021 Files

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GSO ISO 20654:2021 Scope

ISO 20654:2017 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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