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Thread: Crucible preparation advice needed

  1. #1
    Join Date
    Jan 2024
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    2

    Question Crucible preparation advice needed

    Happy New Year everyone! Iíve been silversmithing as a hobby at home for just over a year now and I decided to have a go at doing a small sand cast. However I am being hindered at my first hurdleÖ For some reason my borax wonít glaze despite the crucible glowing hot. Iím starting to wonder if my borax is fake (although Iím sure itís not because why?) 🤪😅 I am using two torches, one auto start, go system blow torch with max operating temp of 1600 and another small dremel hand torch.
    Any trouble shooting advice would be appreciated ❤️

  2. #2
    Join Date
    Jul 2009
    Location
    Romsey
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    5,260

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    I don't think the Dremel torch is going to help you much. What model is the GoSystem one? Boxing the crucible in with firebricks can help retain the heat.

    As for fake borax - depends where you bought it. There's non-borax sold as a substitute for laundry use (EU ban on it) and that won't work, but the real stuff is readily available from jewellery/forging/chemical supply places.

  3. #3
    Join Date
    Dec 2014
    Location
    South Australia
    Posts
    1,852

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    I think your Borax may be suspect, I have never had to have a crucible (Clay) glowing hot to glaze it

  4. #4
    Join Date
    Dec 2009
    Location
    Central London
    Posts
    8,878

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    Yes a lot of it online is borax substitute for domestic use.

    If you just need a small amount, you can scrape a borax cone with a knife.

    For a 100 g of powder go to https://atthebench.store/product/bor...x-powder-100g/

    Cousins sell a kilo tub cheaply:https://www.cousinsuk.com/product/flux-powder-borax. Dennis

  5. #5
    Join Date
    Jan 2024
    Posts
    2

    Default

    Quote Originally Posted by ps_bond View Post
    I don't think the Dremel torch is going to help you much. What model is the GoSystem one? Boxing the crucible in with firebricks can help retain the heat.

    As for fake borax - depends where you bought it. There's non-borax sold as a substitute for laundry use (EU ban on it) and that won't work, but the real stuff is readily available from jewellery/forging/chemical supply places.
    Thanks so much for all your responses, I really appreciate it. Iíve been away so itís taken me a while to get back on here. The torch is: Autostart Blow torch AT2071H.

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