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Domed
3cm disc-shaped glass with no dust or sharp edges. |
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Purpose
made to meet the official "Crystalline" Glass
regulations of oxide content, refractive index and density. |
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Designed
to work with blowing coloured glasses - such as Kugler and
Gaffer at approx 99/100 COE 25-400oC (95/96 if using to 0-300oC
temperature comparative range). Please note that Reichenbach has
a lower expansion stated at 92 to 96 COE 25-400oC |
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A
general guide is to charge at 1250-1280oC, and refine/melt at
1165oC until morning |
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Working
temperature 1000oC+ |
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Density
2.596 kg/m3 Brightness Index 1,5316 |
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Annealing
490-505oC for 90 minutes, 40oC per hour to 375oC, then 80oC to
room temperature for typical thickness |
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Batch
Mix 8% - De-dusted Mix 25kg
bags - Suitable for Kugler and Gaffer Colours
De-dusted
batch mix (not pellets) containing approx 8% lead oxide to give weight and polishing properties.
A homogeneous, low dust ready to use glass batch.
BM08SB:
Refractive Index 1.5189; Density 2.597; Annealing Point 500 - 520oC; Softening Point
662oC; Working Temperature 985oc; Melting temperature 1175-1200oC
using small charges melted in between each charge.
Batch
Mix 24%
- De-dusted Mix 1
tonne big bags - Not for overlay coloured work
De-dusted
batch mix (not pellets) containing approx 24.5% lead oxide to give weight and polishing properties.
A homogeneous, low dust ready to use glass batch.
BM24BB:
Refractive Index 1.5654; Density 3.009; Annealing Point 468oC; Softening Point
652oC; Working Temperature 974oc; Coefficient of Expansion 96
(10-6K-1) - to be melted as batch not pellets or glass
Batch
Mix 30%
- De-dusted Mix 1
tonne big bags - Not for overlay coloured work
De-dusted
batch mix (not pellets) containing approx 30% lead oxide to give weight and polishing properties.
A homogeneous, low dust ready to use glass batch.
BM30BB:
Refractive Index 1.570; Density 3.133; Annealing Point 445 - 480oC; Softening Point
630oC; Working Temperature 935oc; Coefficient of Expansion 96
(10-6K-1) - to be melted as batch not pellets or glass
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