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Mould 8134 Spherical bowl (28cm diameter x 7cm)

Price £46.57 Inc VAT (£38.81 Ex VAT)

All prices include VAT.

Stock Status: Out of Stock
Ref:
Z-G016
We Also Recommend for Mould 8134 Spherical bowl (28cm diameter x 7cm):
Product Information
Spherical mould

Create beautifully rounded bowls (without a flat base) using this mould.

Finding it hard to cut big circles? Try our 28cm clear pre-cut circle to fit this mould.

Diameter 28cm x 7cm - fits in Hotstart kiln

Since the mould is hand-made its dimensions may be slightly smaller than the pre-cut circle. With larger moulds such as this one, your glass blank can overhang the mould by up to 1cm without any problems. Wider than this and the blank may catch on the side of the mould during slumping.

Will this mould fit in my glass kiln?

 

Firing Schedule:

Please Read: This firing recommendation has been calculated using Bullseye Glass with a thickness of 6 mm in a Paragon GL24 kiln, and is courtesy of Bullseye Glass Co. 

Segment Rate (C/hour) Temperature Hold
1 167C 649C :20
2 999 482C 1:00
3 56C 371C :00
4 999 21C :00

Troubleshooting

  • Small kilns may require the process temperature reducing. In the Hobbyfuser and HotStart Pro, reduce the top temperature from 649C to 626C. In the Firebox 14, reduce the top temperature from 649C to 606C. All kilns vary, as does glass viscosity. Testing is necessary.

  • Remove the shelf when slumping in small kilns.

  • Side firing kilns may 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.

  • 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.

Please note that all our moulds are hand-made and therefore the dimensions may vary slightly from those shown. We strongly recommend cutting the glass to the size measured from the actual mould rather than relying solely on the dimensions shown.

All our moulds are designed for multiple use and with care should last for many firings.


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