Highfired

Highfired, or high-fired, is a term used in ceramics to describe wares that are fired at the high end of the firing spectrum. The designation is relative to low-fire and mid-fire ranges and varies by material, but high-fire commonly begins at roughly 1200°C (about 2200°F) and often continues to 1280–1300°C (roughly 2300–2370°F). Wares produced at these temperatures are typically vitrified, dense, and more resistant to water absorption than low- or mid-fired counterparts.

Common high-fired materials include stoneware and porcelain. The bodies are formulated to sinter and vitrify at high temperatures, producing a dense, non-porous structure. Glazes used on high-fired wares are designed to withstand thermal cycling and often become glossy or semi-matte after firing. The term is widely used in both traditional craftsmanship and modern ceramics to distinguish products requiring more energy and specialized kilns from those fired at lower heat.

Firing at high temperatures typically requires robust kilns, such as gas or electric models, with careful control of ramp rates and cooling. Atmospheric conditions may be oxidation or reduction, depending on the desired glaze and color effects. High-fire firings demand longer soak times and precise kiln design to minimize cracking, warping, and glaze defects. Completed wares are generally more durable and water-resistant but can be more costly to produce.

Within potter's circles, high-fire wares are associated with stoneware and porcelain traditions and with modern studio practice that emphasizes vitrified bodies and durable glazes. The term contrasts with low-fire ceramics such as earthenware.