Cone 5. Pieces cast with No. 1 Porcelain Slip fire to the translucency of fine porcelain. Its working qualities make it quite flexible: easy to cast, releases easily from molds and patches well when necessary. No. 1 Slip is especially preferable in doll making. Recommended firing temperature is Cone 5 (2205°F, 1207°C), however in special cases, such as firing small flat lithophanes, the firing temperature may increase to Cone 6 (2269°F, 1243°C). Shrinkage at Cone 5 is 11.75% and absorption is 0%. Available in 1 gallon liquid.