Wendy,
Were you doing a form of ice (snow) dyeing? That uses powder on top of the ice and it isn't mixed with chemical water. When I do low water immersion, etc, I use urea when I make my dye stock. But when I would be doing this type, I wonder if I were to add urea to a small amount of my soda ash solution(that would not be kept) and soak the fabric in it? But then, I'm not good at chemistry and I may be making something not too safe!!! Someday, I'll have to post about the 'almost' exploding jars in my basement. Its a good idea to keep an eye on whatever I'm doing. I think hubby has taken out extra insurance on the house, since I started dyeing cloth. They probably heard about me and denied any extra life insurance on me. Smart folks, those insurance underwriters!!!