Sample preparation, sample presentation and instrument geometry used for measurement can effect both correlation of the measurement to visual assessment and precision of the measurement. A variety of techniques can be used in handling yarn samples so that the most valid and repeatable measurements are achieved.
Color Measurement: Methods and Effects of Sample Presentation (PDF)
View a demonstration on how to measure the color difference between a pair of samples and see what the values mean.
UltraScan VIS is a visible-range, high-performance color measurement spectrophotometer that measures the full range of human color perception. It can be used in production and in the laboratory.
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The USP and EP Color Standards are visual color standards, intended to improve color communication between sites by defining a sample color as being close to physical liquid standard ("near USP F"; "near EP Y2") rather than using words ("light yellow"). Read Vol. 20, No. 8 (PDF)
