随着办公自动化的进展,从中央到地方不少机关晋遍应用传真机,远距离传递文件信息,因而产生了大量的的传真件,如明传电报。我们发现所有传真件在传阅承办过程中,其纸张就越来越黑,字迹变得模糊不清。因此,了解与研究传真机用纸的耐久性及归档的对策,是目前应当解决的问题。传真用纸又称热敏纸,或称感热记录纸、化学纸。从外表看,它跟一般办公用纸相同,白色、光滑。但它却是由两层不同物质构成的,上层为数微米厚的白色感热生色层;底层为基层纸。感热生色层又由隐色体、特殊生色剂和粘合剂组成。粘合剂将隐色体和带有发色基因的生色剂均匀地分布于感热生色层。在没有热源时,彼此不发生作用。当感热生色层一旦受到一定的热量,生色剂迅速溶化,溶进隐色体中与之发生化学反应,使隐色体即刻显现出黑颜色来。传真机就是依据这一特性,根据接收到的不同电信号,控制感热磁头放热或不放热,放热时使纸的感热生色层发生变化,不放热时纸的感热生色层不发生变化,从而纸上形成黑白分明的图象、文字。因此,热敏性质是传真机用纸的显著特征。它的这一性质对传真件的耐久性发生了重要影响。首先,它对温度敏感决定其耐久性差。例如,用指甲在传真纸表面迅速划过,摩擦产生的热会在纸面上留下明显的黑色划痕。第二,它对环境敏感决定其不能持久保存。据了解,有关部门规定,保存传真件的适宜温度为5℃。生产纸的厂家规定,在13℃的环境中,传真纸的有效期为一年。也有的厂家规定,在室温的条件下,其有效期不得超过一年,所形成的传真件保存期为一年。第三,它对光敏感使其难以长久存放。一是由于 With the progress of office automation, many fax machines are widely used from the central government to local offices to transmit document information over long distances, resulting in a large number of fax items, such as telegrams. We found that when faxing all the faxes to the public, the paper was darker and the writing was blurred. Therefore, to understand and study the durability of the fax machine paper and the countermeasures, it is the problem to be solved. Fax paper, also known as thermal paper, or thermal recording paper, chemical paper. From the outside, it is the same as a normal office paper, white and smooth. But it is composed of two layers of different materials, the upper layer is a few microns thick white hot thermochromic layer; the bottom of the base paper. Sensory hot color layer by the leuco body, special toner and adhesive composition. The adhesive evenly distributes the leuco body and the chromogenic agent with the chromogenic genes on the thermosensitive chromogenic layer. In the absence of heat, do not work with each other. When the sensible heat-generating layer is exposed to a certain amount of heat once, the toner rapidly melts and dissolves into the lenticule and chemically reacts therewith, causing the leuco-body to instantly show a black color. Fax machine is based on this feature, according to the received different electrical signals, control the thermal head exothermic or non-exothermic, exothermic heat-sensitive layer of paper to make changes in color, heat-sensitive paper does not heat the students Color layer does not change, so that the formation of black and white paper images, text. Therefore, the thermosensitive nature of facsimile machine paper is a prominent feature. Its nature has had a major impact on the durability of faxes. First, it is temperature-sensitive and its durability is poor. For example, nails on the surface of the fax quickly across the heat generated by the friction will leave a clear black scratches on the paper. Second, its environmental sensitivity determines that it can not be preserved for long. It is understood that the relevant departments, save the appropriate temperature of faxes 5 ℃. Manufacturers of paper production regulations, in 13 ℃ environment, fax paper is valid for one year. Some manufacturers also stipulate that under the conditions of room temperature, the validity period of not more than one year, the formation of the fax storage period of one year. Third, its light sensitivity makes it difficult to store for long. First, because