Yes. We use AZO-free, heavy-metal-free reactive and vat dyes certified to Oeko-Tex Standard 100 requirements, plus traditional plant dyes (indigo, madder root, walnut husk, turmeric) for our natural-dye ranges. AZO dyes, banned in the EU since 2003 for textile use, break down into carcinogenic aromatic amines and are never used in our workshops. If you need documentation for customs or for your own compliance audits, we can provide dye-house certificates with bulk orders.