When shooting precious cultural relics, you should avoid using _ _ _ _ _ _ _ _.

When shooting precious cultural relics, you should avoid using flash.

There are two main reasons why museums prohibit the use of flash lamps. First, the protection of cultural relics. Not all cultural relics will be damaged by flash, and cultural relics with stable materials such as bronzes, ceramics and stone tools are basically unaffected; And books, inscriptions, calligraphy and painting, fur, cotton and linen silk, bamboo and wood lacquerware and other organic cultural relics belong to photosensitive cultural relics. Even a little light change will cause photooxidation to them and break their fibers.

Over time, the whole cultural relic was damaged. Second, due to the dark light inside the exhibition hall, if the flash is used, the change of light and shade will cause discomfort to others' eyes and affect their normal visit.

It is not allowed to turn on the flash when taking pictures in the museum, because the flash will emit infrared and ultraviolet rays, which will produce thermal effects, destroy textile fibers, change dyes and pigments, and lead to the fading of cultural relics. Both visible light and invisible light emitted by the flash will cause different degrees of damage to cultural relics.

Light contains energy. It is these energies that have become one of the chief culprits of cultural relics aging. Perhaps the most deadly is photochemical reaction: under the action of these energies, the molecules on the surface of cultural relics either decompose or react with other substances, thus losing their original characteristics.