Do you rinse tie-dye in hot or cold water?
Avoid putting more than a few tie-dyed shirts in at the same time so that there is plenty of room for the shirts to rinse again. Turn the machine on to cold water to prevent the colors from bleeding together, and DO NOT use fabric softeners or bleach when washing your tie-dyed shirts.
How long should you let tie-dye sit before rinsing?
Let the fabric sit for 2-24 hours. The longer you can let the fabric sit, the easier it will be to wash out loose dye from the fabric. The length of time you let the fabric sit is not overly critical. If you are in a hurry, let the fabric sit for as long as your deadline will allow.
How do you tie-dye with soda ash?
To use soda ash to brighten your next tie-dye project, Burch says to dissolve a cup of soda ash in a gallon of water, and soak your cotton items in it for 15 minutes to make sure the soda ash has penetrated the fiber. “Squeeze out the extra water, then apply the fiber-reactive dye to the damp fabric,” she advises.