This is for stripping detergents/fabric softeners out of used clothing. Let it soak for a couple of hours at least. Swish it around. Then rinse thoroughly.
3 Tbsp Borax
3 Tbsp Washing Soda
3 Tbsp Calgon Water Softener
1/2 Cup Detergent
That’s for a bathtub so probably one Tbsp of each for a laundry tub