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The process of Raku firing differs from other firing methods because the ceramic is removed from the kiln at their maximum temperature.
Ceramics are heated to approximately 1800°F and then removed from the kiln with a pair of tongs. At this stage the glaze on the pots is molten and glowing red. The extremely hot pots are placed into containers of sawdust which produces flame and thick black smoke. The carbon is wicked into the porous clay body, blackening the clay and accentuating the crackle pattern of the glaze. This reduction of oxygen can also lead to a wide array of colors, and even gain metallic effects.