The crystal coffin looks simple in structure, and the actual technology is quite complicated, involving many technical fields. The most stringent requirements put forward by the central government for the design and manufacture of coffins are "solemn and generous, resplendent and magnificent". Has a unique national style; There must be reliable safeguard measures for possible situations, such as earthquake, war, damage and loss. "
Before Chairman Mao's death, there was no crystal coffin in China, and the technical data reserve was almost zero, which made the comrades in charge of design very embarrassed. At this time, some people thought that when Dr. Sun Yat-sen died in 1925, the Soviet government gave him a crystal coffin, but he didn't use it. It has been placed in Xiangshan Park, and the designer decided to follow suit.
With the technical problems solved one by one, finally, the crystal coffin samples processed by Beijing 608 Factory were placed in the simulation exhibition hall on June 27th 1976 165438, and passed the 8-level tests of earthquake resistance, sealing, inflation and cooling.
Extended data:
The crystal coffin is cool and has jade-like anti-corrosion function, which is conducive to prolonging the preservation time of the body. In addition, the crystal coffin itself is corrosion-resistant, especially its transparency is convenient for people to see the leader's remains, which may be the main reason why the crystal coffin is reused. But under the same natural conditions, the antiseptic function of crystal coffin is much worse than that of gold-rimmed nanmu coffin.
The burial tools used by many uncorrupted ancient bodies discovered in archaeology are almost all nanmu materials. There is a short story in "The History of Grave Robbery in China": A bowl of cooked braised pork was put into a nanmu coffin made in the south, and a few months after it was transported to the north, the meat not only did not rot, but also did not cool thoroughly.
In addition, compared with nanmu coffin, the production cost of crystal coffin is much higher, and a good crystal coffin should use at least first-class crystal. 1September, 976, the crystal coffin used after Mao Zedong's death was made of Suzhou Donghai crystal, which is known as the "hometown of crystals". This "crystal coffin" which passed the test of the earthquake with magnitude 8 is still a major breakthrough in China's timely glass technology.
Baidu encyclopedia-chairman Mao's crystal coffin
People's Network-Mao Zedong's Crystal Coffin: Resisting an earthquake of magnitude 8, so far no one can do it again.