I just found a neat trick. I live in a small town in the middle of the old economy (furniture, tobacco, and textiles). Central VA.
Nobody, even the locals supermarket which carries Octagon soap (ancient product) carries Washing Soda (mostly made now by Arm & Hammer).
I think TSP and Lye are a bit on the expensive side for an electrolysis tank--I'm building a big one.
So what's a guy to do?
Basically you can make washing soda out of baking soda. You spread out the baking soda on a sheet pan and bake it. The heat drives off the oxygen in the form of Co2, and steam. I found the link here: http://naturesnurtureblog.com/2012/05/0 ... hing-soda/
If you are a member of Costco or Sam's Club you can by a great big box of baking soda for very little.
Give it a try, can't hurt, you know.
Sisyphus and his Boulder
"Tiny Montgomery sez hello."