I have never had any issues with color fading/altering with this step. It is your choice whether you'd like to use detergent (PHOSPHATE-FREE) or not.
Please read all info below before washing your Sun-printed items.
COLD wash on Delicate Cycle
Warm Iron/Steaming okay.
DO NOT USE:
╳ Tide sticks
╳ Any type of clothing brighteners
╳ Detergents with "phosphate" on the ingredient list
*Do not put detergent directly onto garment to clean.
Spot-clean with WATER first, then throw in wash on delicate cycle if you wish to use detergent.