Rug cleaning
Rug Colourfastness Testing Guide
A practical guide to rug colourfastness testing, dye bleed risk, why colours may move and why cleaning should be cautious on wool, oriental and Persian rugs.
Rug Colourfastness Testing Guide
Colourfastness testing is one of the most important checks before cleaning some rugs.
It helps identify whether dyes may transfer, bleed or change when exposed to moisture or cleaning products.
Quick Answer
Rug colourfastness testing checks whether rug dyes are likely to move during cleaning.
It reduces risk, but it does not guarantee that every part of a rug is safe to clean in the same way.
Why Rug Dyes Can Move
Dye movement can be affected by:
- fibre type
- dye type
- age
- previous cleaning products
- sunlight fading
- urine or alkaline spills
- high moisture
- strong cleaning products
- slow drying
Some colours may be stable in one area and less stable in another.
Rugs That Need Extra Caution
Extra caution is sensible with:
- wool rugs
- oriental rugs
- Persian rugs
- handmade rugs
- older rugs
- rugs with strong reds or dark dyes
- rugs with previous dye transfer
- rugs affected by pet urine
- rugs with unknown cleaning history
For delicate or valuable rugs, a specialist rug cleaner may be the better route.
What Testing Can And Cannot Tell You
Testing can show whether colour transfers during a controlled check.
It cannot promise that:
- every dye in the rug is stable
- old residues will not react
- pet contamination has not affected dyes
- backing colours will not move
- aggressive cleaning will be safe
That is why testing is part of assessment, not a guarantee.
What Customers Should Avoid
Avoid using strong stain removers, bleach, hot water or repeated wetting on a rug without advice.
If colour transfers to a cloth while blotting, stop and ask before doing more.
Related Services
For assessment-led rug cleaning, see Rug Cleaning.
For stain-specific advice, read Rug Stain Removal Guide.
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