Masonry oven India, tandoors are traditional clay ovens, although these days modern electrically fired tandoors are available. The open-topped tandoor is a transitional design between the earth oven and the Roman-plan masonry oven. In the precolumbian Americas, similar ovens were often made of clay or adobe and are now referred to by the Spanish term "horno" (meaning "oven"). Horns are also traditional in the American Southwest. The traditional direct-fired masonry design is often called a "Roman" or "black" oven and dates in Western culture to at least the Roman Republic. It is known as a black oven because the fire generates soot
Polymer clay "stone." Polymer clay remains workable until cured generally. Curing occurs at temperatures from between to sustained for 15 minutes per of thickness. This temperature is significantly less than for mineral clays and can be achieved using a home oven. Professional clay brands shrink very little when cured Brands of polymer clay include Fimo, Sculpey, and Kato Polyclay. A home pasta-making machine is a popular multi-purpose tool for polymer clay artists. It is used to create sheets of uniform thickness, to mix colors or created variegated sheets, and to condition (soften) the clay. Polymer clay generally needs to be conditioned prior