Paper is one of the important tools for recording and disseminating culture, and it is closely related to people's cultural life. The use of paper is not limited to the scope of people's cultural life, but has also become an indispensable material in industry, agriculture and construction. For a long time, the research of ancient paper in China has been mainly based on literature analysis, and the early papermaking technology has been restored by interpreting the relevant words in the literature. Due to the existence of oxidative and deterioration components in the paper, the paper changes, such as yellowing, brittleness, degradation of the edges, and the appearance of color spots in the middle of the paper, resulting in the unusability of the paper, the loss of recorded text, etc., and the growth and change of the question at any time are more serious.
1. The concept of brittle flocculation of ancient paper books.
Brittleness is a human sensory experience, according to some information, it is generally believed that when the paper is subjected to the force of bending, it is brittle, fragile and has poor toughness. According to experience, if the fibers that make up the paper are long and the binding force is good, the toughness will be large, and the strength loss will be less after bending and compression; Paper made of raw materials with short fibers and poor toughness loses more strength after bending and pressing. Based on this experience, the researchers gradually explored some methods to test brittleness. With the development of fracture mechanics, the theories and methods of brittleness testing are making continuous progress. Flocculation, which is manifested as the appearance of fluffy paper fibers around ancient books, is mainly caused by excessive friction in the circulation of books.
2. Detection methods for brittle flocculation of ancient paper books.
Shanghai Baosheng TAThe XTC Paper Tester is an instrument used to measure the brittle flocculation of materials such as ancient paper, books, etc. It works by applying a gradual increase in pressure to the sample material until it breaks. The force required to rupture the sample is then measured and used to calculate the rupture strength. This test method is an important quality control tool for manufacturers of paper, boxes and envelopes. The brittleness of the paper is the percentage decrease in the tensile strength of the specimen after it is pressed.