河北福彩20选5除五走势图

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您的位置:河北福彩20选5除五走势图 -> 印刷纸张 -> 纸张知识-纸张基本性能大全

纸张知识-纸张基本性能大全


1.定量

DINGLIANGSUCHENGKEZHONG,SHIZHIDANWEIMIANJIZHIZHANGDEZHONGLIANG,YIBANYIMEIPINGFANGMIDUOSHAOKELAIBIAOSHI。

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2.水分

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水分是检测纸张的重要指标。任何纸张的产品标准都有水分百分比的规定,这是因为构成纸张的主要成分是纤维素,纤维与水的关系,是纸张抄造中最重要的关系。单根纤维的水分含量影响纤维强度、绵韧度和纸页成形性能。纸张的水分影响纸张的重量、强度、耐久性、规格稳定性、油墨接受能力、整饰度、柔软度和纸张的整个印刷性能和电气性能等等。因此,水分是纸张的重要指标。

3.厚度

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4.JINDU

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5.平滑度

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PINGHUADUJUEDINGYUZHIZHANGDEBIAOMIANZHUANGKUANG,RUGUOZHIMIANAOTUBUPING,ZHIDEPINGHUADUHENCHA。

6.撕裂度

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河北福彩20选5除五走势图 ZHIDEDUANLIEDUJIUSHIZHIYUZHIBANKANGHENGLIEDENENGLI。

7.NAIZHEDU

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河北福彩20选5除五走势图 NAIZHEDUBIAOSHIZHIZHANGDENAIROUZHEDIEDENENGLI。

8.伸长率

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9.纸和纸板的纵横向

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10.吸收性

XISHOUXINGSHIZHIZHIHEZHIBANDUISHUIHUOQITAYOUJIRONGYEDEXISHOUXINGNENG。

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11.白度

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 胶版印刷纸、证券纸、高级书写纸、画报纸、高级打字纸等纸张要求白度在80%以上,凸版印刷纸、一般书写纸、有光纸要求白度在60~70%之间,新闻纸要求白度为45~50%。对于印刷画报、美术图片等的纸张,一股要求较高的白度,而对于印刷书籍杂志的纸张则白度不宜过高。

12.不透明度

不透明度是纸张的一种光学性质,纸张的不透明度是指单张试样垫一个全吸收的黑色衬垫时对绿光的反射率与完全不透明的若干试样的相应的反射率之比。

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