Better known as lye, worse known as sodium hydroxide; it’s been used from old time to do laundry. I suppose there are things to be careful of, and it may eventually corrode the fibers of clothing, but very sure it works.
Oh, lye, makes sense that is what was use in the olden days to make soap. My neighbor swears by some stuff she calls “blueing”. I am going to try some of the suggestions here.
Thats for the info.
"Washing soda"? I saw a box of that many years ago.