Cone 6 Stoneware/Whiteware transparent glaze
Recipe
Notes
This was an industrial tableware glaze recommended by tech support at Fusion Frits. It fires hard and crystal clear and has outstanding suspension and application properties. However, the frit is not carried by most suppliers. Thus, most people end up using the G2926B recipe instead. However, if you need to most transparent possible, then it is worth the effort to try to get this frit. The magic for the way this glaze fires and its hardness and durability lie in the variety of fluxes it contains and the very low boron content coupled with high SiO2 and Al2O3. The fluxes most likely to create micro-bubbles at this temperature are sourced in a frit. It has the traditional CaO and KNaO, but the talc adds MgO and the frit adds SrO plus a tiny bit of BaO. This mixed-oxide effect produces a very well-melting glaze having excellent melt stability (considering it has only 18% of a low-boron frit). Cautions In Mixing -Screening at 80 mesh is required during preparation if your wollastonite has agglomerated (otherwise, the slurry could be full of tiny lumps). -Fusion Frits recommends 325 mesh silica and A400 nepheline syenite. Among the benefits are the lower CTE and better melting. -The recipe originally used #1 Glaze Ball Clay, but we have switched to the similar more commonly available Old Hickory #5. Because of the low percentage, whatever ball clay is used needs to be effective is suspending and hardening. -Use the cleanest bentonite you have. To prepare it for use, target a specific gravity of 1.5 (divide the total weight of powder by 1.08 to derive the amount of water to use). If needed, add a flocculant (Epsom salts, vinegar) to make it creamy.
Description
Crystal clear industrial dinnerware glaze