New issues: Czech - "Tradition of Czech Porcelain Production - Vladimír Kovářík"

Porcelain is a ceramic material made by heating raw materials, generally including clay in the form of kaolin, in a kiln to temperatures between 1,200 °C (2,192 °F) and 1,400 °C (2,552 °F). The toughness, strength, and translucence of porcelain arise mainly from the formation of glass and the mineral mullite within the fired body at these high temperatures. Porcelain derives its present name from old Italian porcellana (cowrie shell) because of its resemblance to the translucent surface of the shell. Porcelain can informally be referred to as "china" in some English-speaking countries, as China was the birth place of porcelain making.[Properties associated with porcelain include low permeability and elasticity; considerable strength, hardness, glassiness, brittleness, whiteness, translucence, and resonance; and a high resistance to chemical attack and thermal shock.

Tehnical details:
Release date: 20.01.2010
The nominal value: CZK 10
Sheets: 30 stamps
Size: 23 x 40 mm
Design: Vladimír Kovářík
Engraving: Frederick Housa

Postal Authority Czech