[Jewelry making - Article 00119] - Re: [Orchid] Soldering tube settings together

[Helen Hill]

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Hi Ian,

    I always make sure my joints are clean, tight and fluxed well. I've
    had advice saying perhaps I'm heating it up too quickly and too hot
    and also from others saying maybe I'm not heating it up quickly
    enough or hot enough? I don't know where between those two extremes
    my soldering falls. All I know is that some joints work and some
    don't even though I follow the same method every time. I pickle
    between each operation too. 

    I was informed that "plumb" solder as sold in America has the same
    silver content as sterling (ie. 92.5%) and as such doesn't pose a
    problem with the assay office - that's if I've got my information
    correct. UK suppliers don't seem to know about "plumb" solders but I
    would have thought that as we have to send our jewellery for assay by
    law (obviously above the minimum weights), that our solder would have
    to stand up to such standards? The company I have bought most of my
    solder from (Palmer Metals), state their silver content and for hard
    it's only 67% - therefore if the assay office were to scrape a sample
    from across a solder joint, it would probably be rejected! Could
    anyone either in the UK or the US please enlighten me about this? All
    I am aware of is that the US "plumb" solder I was sent worked a treat
    and the UK solder is temperamental at best, sometimes working,
    sometimes not. 

Helen - always open to advice
UK
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