hiilikeramiikka

Hiilikeramiikka, also known as charcoal pottery, is a type of ceramic produced by firing clay with a high organic content at low temperatures. The organic material, typically plant matter or dung, burns away during firing, leaving behind a porous structure. This process results in a distinctive black or dark grey color throughout the ceramic body, often without the need for glaze. The low firing temperature also means that hiilikeramiikka is typically less vitrified and more permeable than high-fired ceramics.

The technique of producing hiilikeramiikka has ancient roots and has been found in various archaeological contexts across different cultures. Its presence often indicates a specific set of available resources and technological capabilities. The porous nature of the pottery makes it unsuitable for holding liquids without further treatment, such as sealing with bitumen or resin. However, this porosity also lends itself to certain uses, such as for cooking vessels where the porous walls could absorb and radiate heat evenly, or as storage containers for dry goods.

In modern times, hiilikeramiikka is often produced by studio potters who are interested in exploring historical techniques and achieving unique aesthetic qualities. The process requires careful control of the firing atmosphere to ensure the desired black color is achieved and to prevent oxidation. The resulting pieces can vary widely in form and decoration, but the characteristic dark color and porous texture remain its defining features.