[Jewelry making - Article 00335] - Re: [Orchid] Casting Tree Bark

[Betsy Marshall]

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    We  just did this in class- okay it was balsa wood, but the same
    substance, the teacher upped the burn out time to 12 hours, (I think
    she added time at the highest temperature point, but not certain)
    then when removing the flask for casting blew out the dust/ash with a
    pressurized air hose. Betsy (hope this helps) PS we still had one
    failure, but that was probably more due to awkward spruing than ash
    clumps( I was last in line so I got to watch everybody else's 
projects)

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