Raku Firing in a Trash Can Kiln: Step-by-Step. 1️⃣ Start by glazing your bisqued pottery. I use a copper carbonate-based glaze for those rich, unpredictable effects. 2️⃣ Fire your kiln (a trash can lined with ceramic fiber) to around 1850°F, or cone 06. 3️⃣ When the glaze hits maturity, use metal tongs to carefully remove the glowing red-hot pieces. 4️⃣ Transfer them immediately into a reduction chamber filled with shredded newspaper. 5️⃣ Seal the lid quickly to trap the smoke. This is where the