Ceramic glaze crawling has nothing to do with your kiln. The problem starts before the piece ever sees heat, and it is almost always fixable without changing your firing schedule. By the Numbers Glaze Crawling: What the Data Shows Sources: Studio potter surveys, Rhodes’ Clay and Glazes for the Potter, Digitalfire Reference Library 70% of…
Ceramic glaze is not paint. It is a glass coating that chemically bonds to clay at temperatures above 1,800°F, and when that bond fails, the defect always traces back to one of three root causes: formulation, application, or firing. This guide covers every common glaze defect (crawling, pinholes, blistering, crazing, shivering, bleeding, running, and more)…
Ceramic glaze is not a waterproof sealant that makes any pot food-safe. The glaze itself must be chemically stable to resist acid leaching from coffee, citrus, and tomato sauce before a mug or bowl can be safely used for daily dining. This guide covers low-fire, mid-fire, and high-fire food-safe glazes from major commercial lines including…
Ceramic glaze is not paint. It is a glass coating that fuses to clay at temperatures above 1,800°F, creating a permanent, waterproof surface that paint can never achieve. This guide covers every major ready-to-use glaze category for beginners: low-fire brush-on glazes, mid-fire dipping glazes, high-fire commercial options, specialty effect glazes (including crystalline, matte, satin, and…
Glaze finish is not a style choice you make after picking a color. It is a chemical outcome of the flux-to-silica ratio in the formula. Change the ratio and you change the entire surface. Matte glazes scatter light. Glossy glazes reflect it. Satin glazes do both. Crystalline glazes grow actual crystals during cooling. Each finish…
Majolica glaze is not just another pottery finish. It is a tin-opacified white surface that transforms porous earthenware into a luminous canvas for brush decoration at temperatures between cone 06 and cone 04 (1828-1940°F / 998-1060°C). The tin oxide suspended in the glaze blocks light transmission through the glass layer, creating an opaque white ground…