Gerstley Borate Blend

Material Overview

A sodium-calcium-borate compound used as a low and mid-range glaze flux. This is a conglomerate mineral made up primarily of Colemanite, Ulexite and Hectorite.

This material is partially soluble and can flocculate glaze slops. It can help prevent crazing when used in small amounts, and can act somewhat as an opacifier in larger amounts, giving glazes a milky appearance. A standard substitute in glazes calling for Colemanite.

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Raw materials for glazes form the foundation of your ceramic finishes. They include ingredients like frits, oxides, clays, and stains, which are blended to create custom glazes and washes. Whether you’re making glossy, satin, or matte finishes, you can count on the materials from Clay-King to get the results you desire.

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