How to Colorfast Your Clothes. Thoroughly clean a large mixing bowl or cleaning bucket, and then fill it with one gallon of fresh, clean water. Add one-fourth cup table salt and one cup vinegar. The vinegar and salt work together to naturally lock the color into the fabric.

Does vinegar keep colors from bleeding?

Vinegar works as a treatment for stains and odors, not colorfastness. The common belief that vinegar keeps colors from fading or bleeding is not entirely true. In fact, vinegar can actually alter the colors in some fabrics instead of preventing them from fading.

Will vinegar set Rit dye?

Vinegar is useless, if you are dyeing cotton. … However, if you are using an all-purpose dye such as Rit, neither vinegar nor soda ash will set the dye. The only way to set Rit dye on cotton, so that it does not bleed badly in the laundry, is to buy a commercial dye fixative such as Retayne.