This is a very special mould to make a medium size but fairly deep bowl. The result can be a simple piece or artwork as well as a utilitarian object in the dining area.
Fuse identical pieces from two contrasting colours. The steep angle of this mould will reveal the bottom colour around the edges.
29cm diameter and 8cm deep
Please Read: The steep angle of the mould may result in an uneven slumping. Reposition the slumped piece and fire a second time. Use a very low slumping temperature with a long soak.
Firing Schedule:
This firing recommendation has been calculated for use with Bullseye Glass of average viscosity with an even thickness of 4 - 6 mm. The chart shown below is also based on the assumption that you are using a top fired kiln, e.g. Paragon GL22, GL24, BVD Flat bed kilns etc.
If you are using a side firing kiln you must allow more time in the first ramp.
Troubleshooting
· Small kilns such as Skutt Firebox may require hold time at process temperature reducing.
· Side firing kilns will require more time in the first ramp than top firing kilns.
· Bubbles in slumping are caused by firing too high or holding too long at process temperature.
· Remove the shelf when slumping in small kilns.
· Cracked moulds or cracked glass is caused by firing too fast in the first ramp or cooling too fast.
· Devitrification on the outside of a slumped piece is caused by firing too high or holding too long at process temperature.
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