New strong Dyespin™ Plus. For the traditional reactive dyeing process you will need dye powder, soda ash, urea (opt), fabric detergent (opt), dust mask, gloves, and safety glasses. Dye Mixing: For the swatch, we used 2 tsp Cerulean Blue dye powder to 1/2 cup warm water with 1/2 tsp urea. You can use less dye powder to get a lighter hue or or more to get a deeper hue. [Cerulean is a homogeneous dye.] Use your own reactive dye procedure or one of the dyeing procedures from the links below. Have fun dyeing!