[Jewelry making - Article 01135] - Re: [Orchid] Prips Flux preparation

[Peter W . Rowe]

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>      A question I have is where to get the TSP? I've called several
>     places and gotten lots of runaround. I'm sure I'm missing
>     something. Hope this helps some. 

    many states have regulations regarding phosphate content in
    detergents and cleaners.  for that reason TSP is often offered in the
    form of alternate phosphate free chemicals, labeled as TSP, which are
    not actually tri-sodium phosphate.  Hardware and paint stores are
    often this way, but equally often, unless state law actually
    prohibits the sale of the stuff, you may still find the real stuff
    displayed less prominantly.  In local Home Depot stores here in
    Seattle, for example, eye level displays show all the stuff labled
    with names like "TSP-90", or others, which are not actually TSP.  But
    down on the ankle level shelf I can often find a plain carbboard box
    of actual TSP. 

    Your other option of course, is any decent chemical supply house 
    TSP has a number of uses beyond deteregents, and the chemical supply
    companies can always sell you some,  Note that for purposes of making
    flux, you can use any of three closely related chemicals.  tri-sodium
    phosphate is TSP.  Just as good is di-sodium phosphate or mono-sodium
    phosphate.  The second two are generally only available as chemical
    reagents, rather than hardware store chemicals, but they work just as
    well for prips flux.  In fact, I've sometimes suspected that
    mono-sodium phosphate may even work slightly better.  Haven't
    actually run comparisons side by side, but memory of a couple batches
    made with that stuff, when I happened to have some are that it was
    somewhat more trouble free in application. 

Peter Rowe

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