Slumping Mould 8136 Spherical bowl (20.5cm diameter)

Spherical Bowl Mould 8136 (19.3cm diameter x 2.3cm)

Mould 8354 Mini Lamp Bender (15 x 15 x 5.7cm)

Mini Lamp Bender Mould 8354 (15.2cm x 12.4cm x 5.3cm)

Spherical Bowl Mould 8138 (40cm diameter x 8cm)

£82.10 £68.42
6 in stock
Large Spherical Bowl  

Create a beautifully spherical piece with this round-based mould. Rubber pads can be attached to the base of the finished piece if more stability is required, or it can be secured when displayed using Museum Gel.

Size: 40cm diameter x 8cm deep. Ideal if you have a large kiln.

Bullseye Code: 8738

Will this mould fit in my glass kiln?

For a smaller size in the same style, try mould 8134.


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/hr) Temp. Hold
1 111C 649C :05
2 999 482C 1:00
3 56C 371C :00


  • 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. Mould manufacturers allow a tolerance of up to 2cm. 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.

Write Your Own Review
You're reviewing:Spherical Bowl Mould 8138 (40cm diameter x 8cm)
Your Rating
Customer Questions
No Questions
Did you find what you were looking for?
We found other products you might like!