[Jewelry making - Article 00108] - Re: [Orchid] silver soldering and acids

[John Burgess]

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>            Since it's come up about the toxicity of
>     Sparex.....does anyone know how long you can use the same batch
>     of Sparex 

    G'day; Don't let's be miserly when using Sparex;  it's so cheap
    to buy it as pool pH adjuster that you could easily afford to use
    a fresh batch every day; what; about 2c a pot? In any case if you
    don't want to 'waste' you might use the appearance of a pale blue
    colour in your pickle pot  (the presence of copper sulphate) as
    an indication  that it is about time to make up a fresh batch. 
    Cheers, 

     
               / \
             /  /
           /  /                                
         /  /__| \      johnb AT ts.co.nz
        (______ )       
    Mapua village is beautiful in spring.  Which has thoroughly sprung.

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