Kõrgpõletus

Kõrgpõletus, a term originating from Estonian, refers to the firing process of ceramics at high temperatures. This typically involves temperatures exceeding 1000 degrees Celsius, often reaching up to 1300 degrees Celsius or higher. The purpose of kõrgpõletus is to achieve a vitrified state in the ceramic material. Vitrification is a process where the clay particles fuse together, creating a dense, non-porous, and exceptionally strong final product.

The effects of kõrgpõletus are significant. It leads to increased hardness, reduced water absorption, and enhanced durability of the ceramic ware. This is in contrast to lower firing temperatures, which result in a more porous and fragile material, often referred to as earthenware or bisqueware. Kõrgpõletus is essential for producing durable stoneware and porcelain.

Glazes applied to ceramics also undergo a transformation during kõrgpõletus. The high temperatures cause the glaze components to melt and fuse with the clay body, creating a glassy, often decorative, and protective surface. The specific temperature and duration of the firing, along with the composition of the clay and glaze, all contribute to the final characteristics of the ceramic piece. This process is a fundamental technique in pottery and ceramic art, enabling the creation of functional and aesthetically pleasing objects with superior material properties.