Calligraphy and painting, whether vertical axis, screen, couplet, scroll, album, or fan face, square, are basically two kinds of paper products and silk products, because they contain fiber, so they are hygroscopic. The paste used for mounting calligraphy and painting contains protein and sugar, which is the food for the beetles to survive. If a painting or calligraphy is not carefully kept, it will be easily eroded, damaged and deteriorated

All collected calligraphy and painting should be placed in closed boxes, cabinets and cabinets, so that calligraphy and painting can have a stable limited space and avoid direct erosion and pollution. But this does not mean that everything will be fine once it is put in, because it will still be eroded, and being eaten by insects is a common destructive phenomenon. Around May every year, with the increase of temperature, the beetles also breed in large numbers. The method of prevention can be used to repel insects with camphor pills or camphor essence produced in Shanghai. When using, camphor medicine can be placed around calligraphy and painting. It is better to put this medicine twice a year by stages, the first time in March to April, and the second time in October to November, so that the pest control effect is better

In addition to medicine, the calligraphy and painting placed in the box, cabinet and cabinet should be turned frequently to remove the unclean things in time. Every six months or so, we should start to look at calligraphy and painting. Especially after the plum rain season has passed, we'd better take out the calligraphy and painting in batches and hang them for a few days to "hang them in the air", which can effectively prevent the calligraphy and painting from mildewing

Mold is most likely to reproduce in humid, warm and dark conditions. Therefore, the temperature of the storage space of calligraphy and painting should be kept at about 14 ℃ to 20 ℃ and the relative humidity at 50% to 60%. If the indoor relative humidity is high, it is easy to cause the paper to become damp and grow mold; But too dry and easy to cause calligraphy and painting warping brittle. When the weather is dry, ordinary families can often use wet mops to mop the floor or put basin water in the room. When the weather is wet, especially in the rainy season, windows should be opened as little as possible, so that the humidity of the room can be controlled accordingly

The words hanging outside for a long time will be exposed to the ultraviolet radiation of the sun, which will fade the color of the calligraphy and painting, blur the handwriting, and cause fiber aging and embrittlement. Therefore, it is generally not allowed to hang precious calligraphy and painting in the hall for a long time, not to mention in the place directly exposed to solar energy. It should be hung up for a while and then stored. If the number of calligraphy and painting is large, it can be hung in turn. In this way, we can not only show the different styles of collected calligraphy and painting, but also delay the aging and discoloration process

Dust is also one of the enemies of calligraphy and painting. The calligraphy and painting hung on the wall, or stored in the box or cabinet, will also be affected by the dust. The fine dust on the surface of the calligraphy and painting will become unclean small particles when encountering certain humidity. When the moisture of the small particles evaporates, they will leave yellow spots on the picture

In addition, we should also pay attention to the protection of calligraphy and painting. When appreciating and watching, do not touch the picture with your fingers, and more importantly, avoid saliva contamination. Do not break the picture and leave a crease when unfolding and rolling. When you collect, take, roll and hang calligraphy and painting, you must be careful and light