没有比那些茁壮成长的陶瓷厂更能说明由手工业走向工业化的自然进化过程;在那里人们首先发现了适合于高温烧成的粘土,再结合透明釉,或颜色釉,在某种程度上突出了坯体的特殊质量。这种制品,如施以透明釉,出窑后往往呈现出很悦目的草黄或淡黄的色调,不过粘土本身常因含有大量的碳素物质和其他杂质而呈兰、灰或甚至黑色等自然色调,这些杂质既可在原矿中消除,也可能在烧成中烧失,或可用来产生器质性的色泽和斑纹的效 There is no better explanation of the natural evolution from handicrafts to industrialization than those thriving pottery; where people first discovered the clay that is suitable for firing at high temperatures, combined with clear glaze or color glaze, to some extent The special quality of the body. Such products, if applied with a clear glaze, tend to exhibit a pleasant yellow or yellowish color after leaving the kiln, although the clay itself tends to be blue, gray or even black due to the high levels of carbon and other impurities Natural colors, these impurities can be eliminated in the ore, it may also be lost in the burning, or can be used to produce organic color and mark of the effect