“Your formulation of Gillespie Borate is so much better than the real-thing, which was always so unreliable. I used it for 25 years or so before it became unavailable. Then I switched to LC’s replacement, which also disappeared. Gillespie Borate is a fabulous product and I am so glad that you have a good supply in stock.”
Deborah – Mountaine Meadows Pottery, VT
Glaze Formulation – Using Gillespie Borate Replacement
G412 Clear Glossy Cone 4-6 (aprox. 2200* F) for raw or bisque ware
- 3 lbs C + C (I expect another ball clay would work, other than Kenn Ball Clay?
- 1.7 lbs. Flint 325m
- 2 lbs Gillespie Borate (Gerstley Borate Replacement)
- 3.37 lbs Frit 3134
- 20.6 lbs. H2O
Notes:
1. To a labeled container, add water then C&C Spinks. This will soak overnight.
2. Next day sieve twice through a 100 mesh sieve.
3. Then add flint 325 mesh, Gillespie Borate and frit – drill then sieve through 80 mesh x
4. Weigh and get a viscosity and dip a test plaque.