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Casting a large bit of wood

Discussion in 'Mould Making and Casting' started by Tony_C, Aug 22, 2017.

  1. Tony_C

    Tony_C New Member

    Hi there,

    I want to cast a large piece of wood, or to be honest it's two piece joined, in clear resin to preserve them.
    The pieces are both sliced across the grain and laid on top of each other, one is a large slice straight across a log, aprox 240mm diameter and about 20mm thick, the other is not so large, 120mm diametera nd about 100mm high. The larger piece is glued in place on top of the smaller, so it looks like a mushroom.
    I have a 250mm silicone cake mold, would this be suitable to cast in?
    My plan is to set it in upside down, slowly building layers till it covers the bottom 10mm or so of the base of the mushroom, then to put a cylinder of some sort over the base and build the layers up till that in encased. Then set about it with a sander to more closely follow the contours of the wood. Does that sound like it would be okay?
    Any tips or advice on casting wood in to resin would be gratefully appreciated.
    Cheers TC
  2. Steph

    Steph Administrator Staff Member

    Hi,

    Silicone cake mould won't work with the clear resin. Food grade silicone isn't tough enough for the chemicals in the resin. What type of wood is it?

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