The flag is similar to that of Sudan and to the Kenyan flag. Both the Sudanese and Kenyan flags reflect the Pan-Arab colors which were first adopted by Syria in March 1920, and last by Sudan which officially hoisted it in 1970.
Ceramics are generally made by taking mixtures of clay, earthen elements, powders, and water and shaping them into desired forms. Once the ceramic has been shaped, it is fired in a high temperature oven known as a kiln. Often, ceramics are covered in decorative, waterproof, paint-like substances known as glazes.
Ceramic tiles are any kiln-fired clay-based tiles. Porcelain tile is a specific type of ceramic tile. It is made from porcelain clay and is fired at extremely high temperatures. It is a very dense tile and virtually does not absorb water. Porcelain is the hardest and strongest commercial tile available. The average PEI rating of porcelain is 5. Non-porcelain ceramic is made from various red and white clays. It does not need to be fired at as high a temperature, and is not as durable or moisture resistant as porcelain. The average PEI range of non-Porcelain tiles is 0-3./p> What is a ceramic tile PEI rating? The PEI (Porcelain Enamel Institute) uses a 0-5 rating system for the abrasion resistance of ceramic tile: