汝瓷与众不同之处。在于瓷土中含少量铜质，使汝瓷烧好后透光可见微红。
Ru wares are distinguished from other porcelains by a slight reddish tint visible in bright light. This is caused by a small amount of copper in the porcelain day.
把锅倒空坐在炭火上，使锅烧热，使铜烧红，熔化其中的污秽，除净其上的锈。
Then set the empty pot on the coals till it becomes hot and its copper glows so its impurities may be melted and its deposit burned away.
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