[Jewelry making - Article 00277] - Re: [Orchid] Sparex No 2 101

[Helen Hill]

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Hi Beth,

>     If you are going to use PH down (sodium bisulfate), for your
>     pickle, keep in mind that this is a swimming pool chemical. It
>     regulates the PH in the water for pools and spas. So... the bottom
>     line is you need to dilute it, not neutralize it; no other
>     chemicals needed except more H2O. 

    What you said is not really accurate. Yes it's a pool chemical and
    pool chemistry is quite complex with a number of reactions taking
    place, but simplified, chlorine based chemicals are generally basic
    or alkaline and as such need to be neutralised to regulate the pH of
    the pool, hence adding pHDown. pHDown is an acidic chemical which
    lowers the pH of the pool to neutral and therefore safe to swim in. 

    Therefore using the pHDown as a pickle is effective because it's an
    acid so it should be neutralised with sodium bicarbonate or similar
    before being flushed into the water system. Most people have such a
    chemical in a cupboard somewhere in their house, either as baking
    soda or washing soda and if not it's on the shelves in the
    supermarkets. 

Helen
UK
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