古代印章材料，大都以铜材为主。

In ancient, copper was adopted as the major chop material.

youdao

语言产生记录，最后产生上万个古代印章。

The language gave birth to the record. Now there are ten thousand ancient seals.

youdao

古代印章材料，大都以铜材为主。自明代(5世纪)，石材取代了铜材，成为治印主要材料。

In ancient, copper was adopted as the major chop material. Carving stone replaced copper to be the major material since Ming Dynasty (about15 th century).

youdao