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1·And the way the experiment measured the common printing paper gloss, smoothness, whiteness, opacity and folding endurance.

并且通过试验的方式测得了印刷常用纸的光泽度、平滑度、白度、耐折度和不透明度。

2·Several starch derivatives was prepared as surface sizing agent, and then compared two indicators including ring crush strength and folding endurance.

制备出几种淀粉衍生物表面施胶液，并对比了施胶后瓦楞纸的环压强度以及耐折度这两项指标。