档案文件主要是由纸张材料制成的,在保管期间,即使不受机械破坏或生物变化(如生霉、虫蛀等),也会因纸张本身自然老化而变质,给档案的利用带来损失。纸张自然老化的影响因素主要是:温度、湿度、光线、空气中含有的杂质等。 1、温度:一般纸张若长期存放在温度为38℃以上的环境中,其强度就会明显地降低。因为温度升高,纸张就可能发生下列两种热降 Archives are mainly made of paper materials. During storage, they will deteriorate due to the natural aging of paper itself, even if they are not damaged by machinery or biological changes (such as mold and insects) . The main factors that affect the natural aging of paper: temperature, humidity, light, impurities contained in the air. 1, temperature: If the general paper stored in the environment for a long time at temperatures above 38 ℃, its strength will be significantly reduced. Due to the temperature rise, the following two types of thermal drop may occur on the paper