Why are cultural relics "forbidden to take pictures"?

Many cultural relics and scenic spots have "No Photographing" signs in many places. Sometimes I feel that I can't take some photos as a souvenir, which is quite a pity. Many friends don't understand this rule. If they don't take pictures and touch cultural relics, they shouldn't damage them.

The main reason for not taking pictures is that the flash lamp damages cultural relics when taking pictures. In fact, most of the ancient buildings in China are made of wood, which is easy to be damaged, and the colored paint on them is also easy to fade and fall off. When taking pictures, the repeated exposure of the flash does great harm to them. So it is generally forbidden to take pictures. The wavelength of ordinary visible light is between 400 nm and 700 nm, and the ultraviolet light below 400 nm has great energy, which is easy to be absorbed by objects and makes them deteriorate. The infrared energy above 700 nm is small and difficult to be absorbed by objects, so it is very safe. Wood, plants, silk and other substances are all polymer structures, containing cellulose or protein, which are easily deteriorated and damaged by light, electricity and bacteria; Other substances, such as stone, copper, iron and ceramics, are not easily affected by light. We use different models of flashlights with long and short wavelengths. But they should all be visible light below 700 nanometers, which is more or less harmful to cultural relics with polymer structure. Therefore, wooden buildings, calligraphy and painting, silk products, murals and other cultural relics should be prohibited from taking pictures with flash.

From the perspective of protecting cultural relics. 1999 In the first half of this year, National Cultural Heritage Administration will issue a new notice on the management of cultural relics, movies and photos. In fact, for cultural relics, National Cultural Heritage Administration only carries out macro management from policies and regulations. The specific management work is that provincial and municipal cultural relics units manage cultural relics according to different situations without violating the unified laws and regulations of the state. Let's talk about the rules against taking pictures. National Cultural Heritage Administration only makes regulations on a large scale, such as paintings, silks, murals, lacquer wood and other cultural relics, which are easily faded by light and cause damage to cultural relics. In principle, they are not allowed to take pictures. But it is impossible to stipulate which cultural relics can be photographed and which cultural relics cannot be photographed; Which cultural relics can be photographed and which can't. Of course, not using flash may not cause damage to cultural relics, but I dare not say that it is absolutely necessary not to use flash to shoot. Some cultural relics may have some special circumstances, which are related to copyright and materials.

There are four main reasons why photography is forbidden in some exhibition halls of the museum. First of all, from the perspective of copyright. Because some temporary exhibition halls display private collections of cultural relics; On the other hand, the exhibition forms of the museum are all designed by the museum staff themselves, and they have made painstaking efforts. If you take photos, if you are imitated by other units and individuals, it will harm the interests of the museum. Second, starting from the purpose of cultural relics protection. Calligraphy and painting, silk and other cultural relics are easily damaged by flash light waves. Third, for security purposes. Someone photographed the orientation and structure of the exhibition hall completely, which provided convenient conditions for criminals to commit crimes. Fourth, in order to ensure the visiting environment. Some people think that taking pictures will make others move, make way, and tripods will take time and bring inconvenience to others. Of course, most cultural relics such as sculptures, bronzes, ceramics, seals and other exhibits that are not easily damaged by light are allowed to take pictures. Individual cultural relics that are not allowed to take pictures will generally not interfere if tourists do not use flash. In fact, if tourists only need some pictures of cultural relics to take pictures, many museums have exquisite picture books, and other museums generally have them.