[Jewelry making - Article 00091] - Re: [Orchid] Understanding Casting Shrinkage

[Todd Hawkinson]

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To all casters past and present.

    I have been casting and quenching my flasks since 1971. At that time
    I even used asbestos flask liners. Currently I practice casting and
    quenching like I have described in my comments for years with an
    update of a OSHA fit mask. I have cast between once and five times a
    week ever since then. Each cast still consists of several flasks of
    various metals and volume; centrifugal as well as vacuum casting. I
    have made several modifications on equipment as well as build my own
    machines. The casting process of I have described are what I know are
    industry standards. 

    Maybe Dan from Racecar could add more detail from his perspective. 

    Bob the caster who taught me many of his tricks is now 70 years old
    and in perfect health. He even smoked for a few years in his teens.
    He cast and quenched for at least thirty years with no venting what
    so ever. 

    What gives? Is casting to be viewed like sucking unfiltered Camel
    cigarettes? I will always advocate the safest and practical way to
    do things. Are those who can only research about technique the only
    real authority on jewelry making? I don't make this stuff up folks.
    If you are lucky enough to ever get into some of the industry casting
    facilities as I have you would see how it is done. 

    Ongoing criticism like this is what will bring forums like this to a
    decline. 

    Quiet now for a while to come.... 

Todd Hawkinson
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