Application of empty drum in ancient mural painting in wet tomb

Recently, the media found an interesting patent -- "application of foamed glue in repairing the empty drum of ancient mural paintings in damp tombs".

The patent, invented by shaanxi normal university, is used to restore the empty drum of damp tomb murals. The patent has been used to restore the empty drum murals in zhanghuai tomb of prince qianling and the empty drum murals in the dome of the tomb of princess yongtai in shaanxi province. The results show that the foamed rubber can be used with high soluble salt content and changing temperature and humidity. Has made contributions to China's archaeological work.

Tomb of princess yongtai

Fresco of prince zhang huai -- bird watching and cicada catching lady

Foamed rubber is a one component, moisture curing, multi-purpose polyurethane foam filled elastic sealing material, is listed as the construction industry "eleventh five-year" promotion and application products. It is understood that the bond strength of polyurethane foam sealants zui small value of 0.004mpa, fully meet the bond requirements, can effectively solve the underground tomb wall drum disease, protect cultural relics.

It is reported that since the end of the last century the beginning of this product in the domestic promotion and application, the market demand has been rapidly expanding, the annual consumption of the national construction market is about 30 million cans, with the improvement of building quality requirements and the promotion of energy-saving buildings, the use of this kind of products will grow steadily in the future.

And the growth of foamed rubber market will drive the increase of its raw material MDI and composite material demand. According to the statistics of professional institutions, the consumption of MDI and composite materials for the production of polyurethane foam caulking agents in 2009 reached about 50,000 tons, and the consumption of MDI and other materials is expected to reach about 60,000 tons in 2010.