Minnesota Clay Co. USA Technical Info-Using Stoneware Glazes

Stoneware Glazes

Minnesota Clay Stoneware Glazes are leadless and available in powder and liquid form. Mix powdered glaze with tap water at a ratio of 12 fluid ounces per pound of glaze. Using a blender will help to activate the suspending agents in the mixture and the resulting slurry should be poured through a 60 mesh sieve. The resulting mixture will likely need an addition of water to obtain a slightly thicker than whole milk consistency. If you have a hydrometer, a 1.40 -1.45 reading is a good target (1.35 reading for BT-1 Clear). Premixed Liquid Glazes should be shaken well and poured into a glaze bucket through a 60 mesh screen. Add water if necessary to achieve a slightly thicker than whole milk consistency.

Minnesota Clay Stoneware Glaze Series:

BT-series Bright Transparent Glazes - 14 glossy colors that allow some or much of the clay to show through. Apply to cone 08-04 bisqued ware and glaze fire from cone 6-9. Mauve Red and Purple provide the best color from cone 5-7.

HG-series Opaque and SG-series Slip Glazes -16 glossy (HG-14 is a semi-gloss) colors that will largely hide the clay body that it is covering. Slip Glazes can be applied over other stoneware glazes to create atmospheric effects. Apply to cone 08-04 bisqued ware and glaze fire from cone 5-9. HG-4 (2nd Hand Rose) looks best fired from cone 4-5.

HM-series Matt Glazes -6 opaque colors with matt surfaces. Apply to cone 08 -04 bisqued ware and glaze fire from cone 5-9. Matt glazes will become smoother and more glossy when fired toward the top end of the recommended firing range.

Application Techniques: Dipping is the best method, but if you must use a brush, brush 2-4 coats, one coat directly after the other. Or, Dip 1-2 coats, applying overlapping coats before the previous coat has lost its wet sheen.