Feldspar - Custer 325 Mesh (Potash) (priced per lb.)

Note: Sold in 5 lb. increments; Sold in 50 lb. increments for orders 50 lbs. or more.

NaKO.Al₂O₃.6SiO₂

Priced by the pound. Crystalline minerals made up of mainly silica and alumina in combination with sodium and potassium oxides. Often considered a natural frit. Used extensively in both clay, up to 25% and glaze, up to 100%.

CUSTER - A potash spar used extensively in clay and glaze formulas.

Typical analysis:
SiO2	72.92%
Al2O3	14.95%
Na2O	4.13%
K2O	3.83%
CaO	2.10%
CaF2	1.10%
Fe2O3	0.03%
LOI	0.86%

Melting Point 1100°C to 1300°C

**Note: For large or heavy orders that weigh 150 lbs. or more, we will advise you of the approximate freight cost. You will not be charged until we verify shipping costs with you.**

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