PotteryCrafts Frit P2954

Alternate Names: PotteryCrafts Frit 2954

Description: Calcium Borate Frit similar to Gerstley Borate

Oxide	Analysis	Formula
CaO	26.50%	0.99
B2O3	50.30%	1.51
Al2O3	4.90%	0.10
SiO2	17.90%	0.62
MgO	0.10%	0.01
K2O	0.30%	0.01
Oxide Weight		209.19
Formula Weight		209.19

Notes

Chemistry similar to colemanite
We have another analysis that does not specify the MgO and K₂O:
SiO₂ 17.7, Al₂O₃ 4.8, CaO 27.1, B₂O₃ 50.4

Related Information

Links

Materials	Colemanite A natural source of boron that melts at a very low temperature.
Materials	Frit Frits are made by melting mixes of raw materials, quenching the melt in water, grinding the pebbles into a powder. Frits have chemistries raw materials cannot.
Materials	BPS Calcium Borate Frit
Materials	Matthey Calcium Borate Frit
Materials	Ferro Frit 1081
Materials	Ferro Frit 4112 A calcium borate frit (with extremely high boron).
Materials	Potclays Frit 2268
Typecodes	Frit A frit is the powdered form a man-made glass. Frits are premelted, then ground to a glass. They have tightly controlled chemistries, they are available for glazes of all types.
Typecodes	Gerstley Borate Substitutes Many development efforts to create Gerstley Borate substitutes took place during the early 2000s (the initial period when the demise of Gerstley Borate appeared imminent). A number of companies, including Laguna Clays itself, produced and sold these for many years. When Laguna secured another stockpile at the mine and began producing the original material again, interest in substitutes gradually waned. However, the sudden dramatic price increase in 2023 appears to have initiated the process again. Gillespie Borate appears to be the only viable and visible substitute now. Thus, the substitutes listed here are mostly no longer made. Other high-boron materials shown are also no longer available. We continue to recommend sourcing B2O3 from frits instead. Please contact us if you have a specific recipe and we can work with you in your Insight-live account to develop a new recipe that both eliminates the GB and improves overall working and firing properties.
URLs	http://www.potterycrafts.co.uk/Products/0028000b PotteryCrafts Frit information

Data

Co-efficient of Linear Expansion	6.1
Frit Melting Range (C)	1050-1160C

By Tony Hansen
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