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纸不仅是记载和传播文化的重要工具,并巳成为工业、农业、交通以及建筑等方面不可缺少的材料.它是商业经营中的主要商品之一. 一、纸的性能纸的保管性能大致有以下几个方面: (一)怕损伤:纸受到机械外力的作用,会发生破裂、磨损揉折、皱纹和撕坏等损伤. (二)怕日晒:除色纸要求具有均匀一致的鲜艳色彩外,对于白纸则要求有较好的洁白程度。纸张经过日晒会发黄变脆、褪色.纸板被日光照晒容易曲翘不平,影响使用.铜板纸经过日晒,不但会变黄变脆,而且还会使纸面上的涂粉脱落。 (三)怕潮湿:纸含有6～12％的水
Paper is not only an important tool for documenting and disseminating culture, but also an indispensable material for industry, agriculture, transportation and construction, etc. It is one of the main products in commercial management. The following aspects: (a) afraid of injury: paper by the role of mechanical external force, there will be rupture, wear rubbing, wrinkles and tear damage. (Two) afraid of sun: In addition to color paper requires uniform bright colors In addition, white paper requires a better degree of whiteness. Paper will be yellow after the sun will become brittle, faded .Can be sunshine prone to curl, affect the use of copper paper after the sun will not only become yellow and brittle, but also make the paper powder off. (C) fear of moisture: paper contains 6 to 12% of the water