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.
Backing is part of the method
If the textile is not optically opaque, white, black and self backing can give different values. Record the chosen backing and use it for the target, sample and every site.
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
01
Place
Cover the complete illumination and viewing area, keep the face outward and align the marked direction.
02
Reposition
Move to each defined location; do not take repeated readings without moving and call that fabric sampling.
03
Retain
Store the spectrum, individual readings, mean and range so an acceptable average cannot hide barré or edge-to-centre variation.
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
Topics
Applications
Related knowledge
Fundamentals
Color Measurement in Textiles
A complete framework for measuring textile color across fibre, yarn, fabric and finished goods, including texture, direction, UV, metamerism and shade control.
Technical guide · Read the guide →Measurement Techniques
Measuring Yarn and Fibre Color
Measure yarn and loose fibre color with controlled packing, tension, mass, holder, backing and repacking so gaps and orientation do not dominate the result.
Technical guide · Read the guide →Measurement Geometry
Measuring Textured Fabrics
Measure textured fabrics by controlling pile state, pressure, aperture, geometry, orientation and spatial sampling across knits, terry, fleece and raised surfaces.
Technical guide · Read the guide →Measurement Geometry
Measuring Directional Fabrics
Measure directional fabrics by fixing warp, weft, nap or brushing orientation and deciding whether one viewing direction or a validated rotational average represents use.
Technical guide · Read the guide →UV Measurement
Measuring Fluorescent Textiles
Measure fluorescent and optically brightened textiles with a defined physical UV condition, textile reference standard, matched sample presentation and verified viewing light.
Technical guide · Read the guide →Illuminants
D65 vs Other Illuminants for Textiles
Understand when textiles are evaluated under D65, A, D50, F11/TL84 and other sources, and why calculation illuminants, viewing lamps and UV conditions must be distinguished.
Technical guide · Read the guide →