1. If you want to keep a piece of paper for a long time, you can buy a transparent hard plastic sleeve to wrap the paper and put it in a dry, cool and ventilated place. This can isolate the catalysis of substances such as temperature, humidity and light, and the paper can be preserved for a long time.
2. The raw material of paper is mainly plant fiber. In addition to cellulose, hemicellulose and lignin, there are other components with less content, such as resin and ash. In addition, there are auxiliary ingredients such as sodium sulfate.