Also on these boards
Beautiful Somehow: Frugal and Simple Laundry Series: Homemade OxiClean and Color Safe Bleach- she has actually used it, so the jury is not out, like most pinterest posts! She gives directions for presoaking, but not for just one load of laundry. The other post says 1 part each of the soda and peroxide and 2 parts hot water.
If you are on a septic system or just want to avoid using chlorine bleach in your laundry…give this a try!