I need to use up the tulip and other Michael's tie dye mixes before the dyes go bad and I can start using the Dharma dyes I purchased. These dyes have soda ash in the dye mix. Assuming that the working time is abut 45 minutes for full color then after 45 minutes what happens to the dye mix? Does the dye cease to react with the cotton or would the colors simply reduce to more to lighter ie pastels of the color? The bottles of mix dye are about 1 quart so there is a lot to use in one session.
Also if I prewash and dry do I need to have any concerns about using the dryer which typically is used with fabric softener sheets? I had dried some wet towels without dryer sheets to "clean" up residual but I would like to eliminate that step,