A blend of sodium hexametaphosphate and STPP would give better results than the later alone. IIRC Calgon and other packaged water softeners used sodium hexametaphosphate along other water softening agents including STPP.
Apparently had a huge following, but so many states have banned phosphates in laundry products that it probably wasn't worth producing for the few states left Quixar was able to market. Bet there are still some product left in some Amway seller's home/garage.
Somehow that word conjures up an old relic sitting on the fr
Laundress, we love you. ur comment reminds me of how in the soap opera world, the show's "matriarch" is usually the veteran, washed-up actress who's kept on for old times sake.