Ashford Protein Dyes Easy to use, safe and comply with Oeko-Tex Standard 100. For use with all protein fibres – wool, silk, alpaca, feather, fur, cashmere, angora etc. Available in 14 clean, vibrant colours. Our dyes have no fillers or salts, they are 100% concentrate so very economic - 10gm of dye powder made to a 1% concentrate will dye 1kg of fibre. Use white vinegar or citric acid to fix the dyes. Create all the colours and shades imaginable.