Saggar atmosphere, or concentrate the effects of salts, metal oxides and other materials on the surface of their ware. Some pots may be carefully prepared for saggar firing. One method creates a smooth surface covered with clay slip, terra sigillata, which responds particularly well to the saggar technique. This slip covering may be burnished to achieve a gloss. Prepared pots are nestled into saggars filled with beds of combustible materials, such as sawdust, less combustible organic materials, salts and metals. These materials ignite or fume during firing, leaving the pot buried in layers of fine ash. Ware produced in filled saggars
Corris Craft Centre and "Bwtri Y Crochan" are open daily from Easter to the end of October. Opening times vary at other times of the year. Corris Mine Explorers is open all year round, although during particularly quiet times, trips may only run if there is sufficient demand. King Arthur's Labyrinth and Lost Legends of The Stone Circle open every day during the season. Corris Craft Centre Corris Craft Centre is a craft and leisure complex in Corris, on the A487 near Machynlleth, mid-Wales. It is sometimes referred to as King Arthur's Labyrinth, one of the attractions on the site. The centre, which