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Thread: Red mallee burl

  1. #1
    Join Date
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    Default Red mallee burl

    Just a quick question to you casting guys.

    Does red mallee burl need casting stabilising ?
    Reason I'm asking is because I'm working on a open saw handle at present.
    And it was suggested that maybe I should get it stabilised.
    But it feels bloody heavy and all the off cuts
    And the saw handle it self, I can't see any voids or anything.
    Also a complete newbie question.
    Does casting stabilising also creat a surface finish ?
    If so I will need to finish shaping the handle first yes?

    Cheers Matt
    If it does need stabilising I know just who I be asking cough cough Gab [emoji106]

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  3. #2
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    Default

    Stabilising does't turn your wood to plastic nor does it give the surface a permanent coating although ponding bleed-out resin can pond on a surface that actually has to be removed. It also doesn't fill holes/visible cracks etc it just fills microscopic air voids between the fibres with resin thus increasing the density. As the stabilised wood has little or no air between its fibres it then doesn't react to temperature and therefore expansion/contraction is minimised. It also help the wood with water resistance but does not make it waterproof.

    Red Mallee is already fairly dense but the burl does have possible minute cracks between the grain within its structure and hence stabilising can help. Stabilising will also help resist cracking from continuous movement and moisture variation.

    Is it actually necessary, hmm good question, but it can't hurt and will help. All the professional knife makers I supply knife scales to insist on them being stabilised.
    Neil
    ____________________________________________
    Every day presents an opportunity to learn something new

  4. #3
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    I forgot to mention however, to stabilise timber it must be first completely dry ie 0%MC. To do this something this size would need to be placed in an oven for 24hrs prior to soaking under vacuum in the stabilising resin. Because of the already carved shape this may indeed deform and crack the handle. With care in the drying process, ie in dehydrator first to reduce MC to ~4% before the oven, the risks would be minimised.
    Neil
    ____________________________________________
    Every day presents an opportunity to learn something new

  5. #4
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    Thank you.
    Mr Dai Sensei
    And sorry for the late reply
    You answered all my questions perfectly
    Thank you

    Cheers Matt

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