How to Measure Fabric Color

To measure fabric color reliably, define the comparison first, condition the specimens, present the same face and direction, make the stack opaque or control its backing, and average readings from representative positions. Every standard and production sample must use the same instrument settings and physical presentation.

Define the comparison

Identify the approved physical standard or spectral target, its revision, the fabric construction and the stage being approved. Greige, dyed, heat-set, coated, washed and finished fabric can have different color and surface character. Compare like stages unless the method deliberately measures process change.

Condition and prepare the fabric

• Condition consistently. Use the atmosphere and time required by the applicable standard or internal method, especially for moisture-sensitive fibres.
• Select the correct face. Mark face/back and warp or machine direction before cutting or folding.
• Control opacity. Fold into a repeatable number of layers or use a specified backing. Check that adding another layer no longer changes the result materially before declaring the stack opaque.
• Avoid altered areas. Exclude creases, selvedges, contamination and defects from a shade average unless they are the inspection target.
• Do not stretch. Present knits and elastic fabrics without uncontrolled tension; stretching changes cover factor and exposes the backing.

Set and verify the instrument

Standardise the instrument, then lock geometry, aperture, SCI or SCE, UV condition, illuminant, observer, color space and difference formula. Use the largest practical aperture that fits a uniform portion of the sample. A large viewed area averages yarn and weave variation better, while a small aperture increases placement sensitivity.

For sphere instruments, SCI generally reduces the effect of differences in gloss and texture; SCE is more sensitive to surface finish. Select the condition during method validation and do not change it to improve agreement. Fluorescent whites and bright shades require an explicitly controlled physical UV condition.

Measure representative areas

For roll control, define positions across the width and at intervals along the length. The number of readings should come from a pilot study of material variability and the quality risk, not from a universal rule.

Report enough to reproduce the result

Record sample identity, lot and location; conditioning; face, direction, layers and backing; instrument and aperture; geometry and specular mode; UV condition; illuminant and observer; formula and tolerance; individual values, average and decision. Pair critical shade approvals with visual assessment under the specified viewing lights.

References and further reading

• ISO 105-J01: measurement of textile surface color.
• AATCC EP6: Instrumental Color Measurement.
• ISO 139: textile conditioning atmospheres.

Continue with textured fabrics, directional fabrics and fabric tolerances.

Last reviewed 22/09/2026 · Level: Intermediate

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