I have been looking everywhere for trisodium phosphate, to make
up some Pripp’s Flux. The “TSP” I have found in local stores does
not actually contain any phosphates and is not what I am looking
for. So far I have only been able to find a 55 pound bag of it at
a building supply store. I didn’t even ask for a price because I
cannot buy such a large amount. Does anyone know where I can find
this compound, in a more manageable size?