漫谈景德镇柴窑的“柴”“窑”“火”
2021-08-24陈华军
陈华军
摘要:所谓“入窑一色,出窑万彩”,形容的是陶瓷坯体最后经过柴窑“火”的烧炼后,成为了精美的瓷品。这是一道难过的“坎”,这期间陶瓷坯和“马尾松柴”以及窑炉三者都发生化学与物理的变化,演绎出了用什么样的“柴”,什么样的“窑”,什么样的火温烧出什么样的“瓷”的神秘变化。
关键词:松 柴 镇 窑 窑 火
Talking about "Wood ", "Kiln" and "Fire" of Jingdezhen Chai Kiln
Chen Huajun
Abstract: The so-called "one color is put into the kiln and ten thousand colors are out from the kiln" describes that the ceramic body has finally become exquisite porcelain after being fired by the "fire" of the wood kiln. This is a difficult "Kan"(literally means bottleneck). During this firing period, chemical and physical changes have taken place in ceramic body, Mawei Pine wood and kiln itself, demonstrating the mysterious changes of what kind of "wood", what kind of "kiln" and what kind of "porcelain" is produced by what kind of fire temperature.
Keywords: Pine Chai(literally means firewood), Zhen Kiln, Fire of Kiln
所谓柴窑,就是木柴和窑炉的组合名称。当瓷土制作成坯胎后,再经过柴窑高温的烧制,方能成为精美的柴窑瓷。柴窑烧制过程极其复杂,而景德镇与其他地区柴窑所不同的是燃料、窑房和窑炉的构造。燃料的不同是景德镇运用了“马尾松柴”,松柴在燃烧过程中所散发的松节油成分被坯体有效吸取,使成瓷显得油润光滑。窑的不同在于窑形和窑炉的通风结构、窑房的构造,具有代表性的柴窑就是景德镇镇窑。而这一切都联系着“火”,火是炼就精美陶瓷的关键。清代陶器入窑,初曰溜火,欲习于火而无赢。既曰紧火,欲孰于火而无缩。风火之窑,审候为难。清雍正《江西通志》称:“造坯彩画,始条理也。入窑火候,终条理也。”
一、松柴
任何柴都能烧出瓷器,然而用乔木“马尾松”,锯成块片的“松柴”却是上乘的燃料。因松柴含有丰富的松节油,这种油性物质属于高闪点可燃液体,因此燃烧温度高,火焰清而纯净,不含有害物质硫磺,燃烧时会产生大量的油烟。松柴另一个特点是对含铁较高的高岭土其二元配方的坯料、灰釉、钙釉等还原气氛最佳,烧制过程中产生松节油,使窑壁上挂着丰富的松油脂,而松油脂在高温下与瓷石、高岭土二元配方相互作用,使烧出的成瓷釉面肥嫩而滋润,油腻透光,白里透青,青花图案犹如瓷面上生长出来的纹饰,显得自然生动。……
