A pair of new Levis seem to have transferred a significant amount of
blue dye onto a light coloured chair (supposedly treated with a stain
protection system).

I've used a Vax Rapide XL with some Prochem Extraction Pro (as
recommended by TMH) but there's still a fairly bad stain.

Would neat Prochem work, or would it damage the fabric?

Any ideas on what to do next gratefully received.

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F