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Determining the Amount of Glass
Needed for Kiln Casting
This
is part two of a multi-part tip on ways to determine the amount of
glass needed when kiln casting. Click here to go to the first
section of the tip.
The water displacement
method
In addition to the prepared mold and the
glass cullet or frit, this method requires water and a bucket.
1. Fill the bucket with water.
2. Mark the level of the water on the
outside of the bucket.
3. Pour water from the bucket into the
mold cavity. You should work quickly, so that the water
doesn't seep into the mold material.
4. Once the mold is full, remove the
water. This may be discarded.
5. Refill the bucket (which should
still contain the water which was not poured into the mold) with
your glass cullet or frit until the water level rises to the mark on
the side of the bucket (the mark you made in step 2).
6. The amount of glass required to
raise the water level is also the amount it will take to fill the
mold. So simply remove the glass from the bucket, fill the
mold, and fire as normal.
7. If desired, you can allow the glass
and mold to dry before firing.
Click
here to read about the specific gravity method of calculating how
much glass your mold will require.
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Copyright 2005 Brad Walker.
All rights reserved.
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