Hand dyed fabric can vary in color from dye lot to dye lot. There’s no way to get the exact same color every time. This is very important to keep in mind! Soda ash is used as a fixative for the dyes. I use low impact fiber reactive dyes. I use nontoxic textile detergent, environmentally friendly scented laundry detergent, and plant based fabric softeners. I can provide more detailed information on these items upon request.