I made laundry detergent from washing soda, baking soda, Borax, and castile soap. Here's the recipe: Now you need to measure with a tin can (just a regular tin can, like the kind that
corn comes in). In a large container with a tight-fitting lid, mix 3 cans of Borax, 3 cans of baking soda, 3 cans of washing soda, and an 8 ounce bottle of castile soap. I found that stirring didn't work very well, so I put the lid on the container and shook it up really well.
I have been really pleased with this detergent. Dissolved in hot water (it is not as good in cold water), it actually removed stains and oils, and it makes the laundry smell really clean and fresh.