BS ISO 20654:2017定义了一种用于评估斑点油墨中间色调的指标。这种方法 专色色调值（SCTV）的计算产生大致均匀的视觉间距 在基底和固体之间的音调。它可以通过光谱反射率或比色法计算 固体油墨、基材和一块或多块中间色调的测量。交叉引用:ISO 13655:2017ISO 17972-4:2015ISO 5-2:2009 Ed 5ISO 17972-1:2015 Ed1购买时可用的所有当前修订版均包含在本文件的购买中。

BS 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.Cross References:ISO 13655:2017ISO 17972-4:2015ISO 5-2:2009 Ed 5ISO 17972-1:2015 ED1All current amendments available at time of purchase are included with the purchase of this document.