Eco type dyes free from harmful chemicals and are environmentally friendly. All fibers can be dyed with water (above 30 degrees Celsius) Can be easily dyed using a washing machine or the like. Colors are pastel bright hues. When dyeing cotton, linen, or rayon, please use salt as an aid and vinegar for silk, wool, and nylon. For all polyester, use a heat dye set and use heat dye. Colors are dark and vibrant. However, acetate and all acrylics will be lightly dyed. 250 grams per jar of white fabric or t-shirt (100? 4.6 oz (130 g) of dye.