Attempts by medieval European potters to imitate true porcelain led to the discovery of soft-paste porcelain, which can be cut with a file.

中世纪欧洲工匠在试图制造硬质瓷的过程中发现了可以用锉刀切割的软陶。

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The three main types are true (or hard-paste) porcelain, artificial (or soft-paste) porcelain, and Bone china.

主要的三种瓷器有硬质瓷（真瓷）、人工瓷（软质瓷）以及骨灰瓷。

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