本课题的目的是寻找二次纤维新闻纸的最佳印刷实地密度的实验方法，实现对彩色报纸印刷品图像再现质量的控制。
The purpose was to study the best printing solid density on secondary fibers newspaper, to realize the control of the image reappearance quality and improve secondary fibers newspaper's performance.
新闻纸被用来制作报纸和一些杂志或书籍，而牛皮纸则被用来制作购物袋。
Newsprint is used for newspapers and some magazines or books, while kraft paper is used for shopping bags.
报纸是新闻纸。
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