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Can Stain Remover cause colour change on fabric?Updated 4 hours ago

TL;DR: Stain Remover is bleach-free, but some fabrics can still experience colour change depending on how the dye was applied during manufacturing. Always spot test first.

Last reviewed: April 2026

Koh Stain Remover
Koh Stain Remover problem vs solution

Why can colour change still happen?

✓ Bleach-free, enzyme-based

Stain Remover doesn't contain chlorine or oxygen bleach. It uses enzymes and surfactants to lift stains at a molecular level, which is why the formula is classified as colour-safe on properly dyed fabrics.

⚠ Colour loss from the fabric

In some cases, lighter patches or fading can appear after treatment. This is usually due to colour loss from the fabric itself, rather than bleaching caused by the product. Fabric dyes vary widely, and some are less stable than others.

Bleach-free formula Dye stability varies

⚠ More likely if

  The dye was not fully fixed during garment manufacturing

  The fabric is highly dyed, dark, or brightly coloured

  The garment already had wear, fading, or heat exposure

Unfixed dyes Dark or bright Worn or faded

How do I reduce the risk?

✓ Reduce the risk

  Spot test on an inside seam where the fabric is layered at the stitching

  Follow the garment care label. Never treat a "dry clean only" garment at home

  Don't leave the product on longer than directed (5 to 15 minutes)

  Rinse and wash thoroughly after treatment. Don't let the product dry on the fabric

Spot test inside seam Follow care label Don't over-dwell

How do I spot-test for colourfastness?

✓ 3-step spot test

1

Apply a small amount to a hidden seam or inside hem.

2

Wait 5 to 10 minutes, then blot with a white cloth. If you see dye transfer onto the cloth, the fabric isn't colourfast.

3

Rinse the test area, let it dry, and check against the rest of the garment. If it looks and feels unchanged, you're good to treat the stain.


Koh Stain Remover Starter Kit

New at Koh?

Stain Remover Starter Kit pairs Stain Remover with the Foaming Spray Bottle for targeted application.

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