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    油墨的发展史
    2000年前作为印刷的物质基础之一的墨便已出现了，国际间公认中国是古代文明中最先使用墨的国家，早在西汉时期（公元前200年）就开始使用墨了，这种墨可以在竹帛上写字传递信息，其某些功能与当代油墨可以类比的。

    2018-03-31
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