是用氧化铅作助熔剂，烧成温度在1000℃以下，上在已烧成的瓷器上，入炉二次烧成的颜色釉。《南窑笔记》称其为“炉内颜色”。发明比青釉晚，但在汉代已较普遍。低温色釉釉面光泽强、表面平整光滑，釉层清澈透明；色彩丰富，传统品种有胭脂红、孔雀绿、象牙黄、鱼子黄、宝石蓝、葡萄紫等。缺点是硬度较低，易出现划痕，化学稳定性也较差。
介绍了一种骨灰瓷用无铅釉的研制结果。
Introduced preparation results of one new kind bone China lead-free glaze.
钓鱼台宴会瓷器系专为钓鱼台国宾馆各类宴会而开发研制的无铅釉健康绿色骨瓷。
The Diaoyutai banquet tableware is made of non-plumbic-glazed healthy bone porcelain, which is developed specially for Diaoyutai State Guesthouse.
应用正交试验法，研究了碱金属氧化物及氟化物对环保型无铅釉上彩熔剂性能的影响。
The effect of alkaline metal oxides and fluorides on the performances of green leadless fluxing agents for overglaze colors were studied by means of orthogonal experiments.
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