| Before
Casting any mold, be sure to open it a get
a visual of what you will be casting.
This is the
time to check for any possible stress
problems and ward those off before
casting.
The goblet
mold shown, and all of the Boothe Coffee
Mugs and Tumblers are calibrated for a
casting thickness.
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| This
thickness can be measured by using a ruler
and measuring the inside top rim. This
mold indicates 1/4 inch cast is the
correct thickness to make a perfect goblet
cast. |
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Re-assemble
the mold.. and band tightly.
For
Information on Banding Straps Click Here. |
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| Pour
slip into the mold, and continue to top
off as needed. ( As the water from the
slip is absorbed into the plaster forming
the shell of the ware, the slip level will
sink down in the spare..) Topping is
a term which means to add additional slip
to keep the mold full, until you are ready
to dump.. |
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| Check
the spare for casting thickness. This is
done by cutting a notch into the clay with
a fettling knife. On this mold we
needed 1/4 inch thickness. |
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| Time
to dump the slip.. On on this mold, as
soon as the clay stops running from the
mold, TURN THE MOLD RIGHT SIDE UP.
Do not
leave the mold in an upside down position.
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| When
the slip has lost a glossy or wet
appearance, trim the spare. For this
design we are using a plastic fettling
knife that has a turned up tip. |
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| After
trimming the rim of your stemware glasses
should be very close to flush with the
body, requiring very little clean up in
the greenware before bisque firing.. |
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| After
trimming, ware will need to set in the
mold from 1 to 2 hours before de-molding.
This number is depended on your slip
formula.. Wetter slips can or should
remain for up to 8 hours. We work
with a dry formula slip, which sets up
quickly and requires a fast de-molding.
Getting to know your slip adds to your
success in the casting room. |
| The
proper way to dry all stem ware is to
place it bowl side down on wall board, or
foam core.. |
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Correct..
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| Correctly
cast stemware should always have filled
stems.. |
