Definitions for "Flameware"
Flameware is pottery that must withstand severe temperature changes without cracking (i.e. stove top burners). Ceramic is much more susceptible to thermal shock failure than most other materials because of its brittle nature, lack of elasticity and tendency to propagate cracks. Ovenware is not nearly as resistant to thermal shock as flameware. Flameware bodies are typically made from as high a proportion as possible of low expansion minerals like spodumene, kyanite, mullite, and pyrophyllite. Theoretically 100% of these minerals is the ideal but for practical purposes clay and other flux content is also needed. Flameware cannot normally be glazed because it is not possible to make a glaze of low enough expansion not to craze.
Ware created with a claybody capable of withstanding extreme thermal shock produced by direct contact with an open flame or being subjected to a pre-heated oven. There are a number of factors that could classify a claybody as flameware, but the key factor is the ability of a piece to remain intact while different areas are experiencing a difference in temperature of several hundred degrees. When purchasing a piece for the purpose of such use, check the label or get some other form of confirmation. Flameware is sometimes referred to as "cookware", but it should not be confused with "ovenware" which cannot withstand a similar direct contact with a heat source. See also ovenware.
A flameproof ware, as distinct from ovenware.
Keywords:  flaring, flashed, glass
Flaring Flashed Glass