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Medium Classic Mould 8123 (30cm diameter x 8cm)

Price £48.07 Inc VAT (£40.06 Ex VAT)

4.5 out of 5 stars (2 Customer Reviews)
 Go Back to Circular Moulds 

All prices include VAT.

Stock Status: 2 Units in Stock
We Also Recommend for Medium Classic Mould 8123 (30cm diameter x 8cm):
Product Information
Medium Classic Mould  

Create elegant and functional bowls with this flat based mould.

Size: 30cm diameter x 8cm high.  The flat base is 10cm in diameter. Try using with a 30cm pre-cut glass circle. 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?


This classic mould will fit in both the Skutt HotStart Pro and the Skutt Firebox 14 kilns.

To create larger bowls, try mould 8124.

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 167C 663C :45
2 999 482C 1:00
3 56C 371C :00


  • Small kilns may require the process temperature reducing. In the Hobbyfuser and HotStart Pro, reduce the top temperature from 663C to 640C. In the Firebox 14, reduce the top temperature from 663C to 620C. 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.

Product Reviews
4.5 out of 5 stars
5 out of 5 stars Thursday 26 May, 2016 By Anne Leonard - See all my reviews
Just made my first piece with this mould and I am delighted with it. Beautiful shape and perfect size.
4 out of 5 stars Saturday 05 July, 2014 By Sharron McLeod
Excellent, reliable mould with a very popular shape. My only request is that they make it one cm bigger so you could slump an even 30cm disk in it comfortably.

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