The moldy cultural relics and mildew stains displayed in the cultural relics exhibition cabinet are generated by a variety of microorganisms growing in the air. It is impossible for them to "grow" utensils in a well ventilated environment with low temperature and humidity, even if they are affected, they can remain stable.
Wooden collections, they are extremely active and build into structural damage. These insects can drill the interior of the wood, making the exterior a thin shell, and then move the target to the next collection. The particles they leave behind, called mothballs, are evidence of an attack. Formaldehyde, methyl bromide (methyl bromide) or ethylene oxide are usually used for fumigation. It can also be treated locally with detergents formulated with green hydrocarbons and a variety of insecticides. The borer diseases mainly exist in the non ventilated warm environment, high humidity environment and wood with low resin content.
Microorganisms usually grow vigorously in tropical areas with relative humidity of 70% and temperature of more than 15 ℃, in non circulating or closed environment, and on surfaces rich in cellulose or protein materials. They can produce common yellow and brown spots on paper or fabric, but they can also form biological groups of various colors and forms on the surface of many materials.
In case of slight discoloration without affecting the appearance, it may be enough to simply reduce the relative humidity and temperature, and place the objects in a well ventilated place, so as to make the exhibits stable. However, long-term storage in the tropical environment may aggravate the pollution. It is necessary to disinfect and sterilize the spores and their by-products after mechanical removal.
The traditional method of trapping and killing microorganisms on printed matter and paintings with thymol steam is still in use. Other fumigants such as formaldehyde vapor and ethylene oxide can also be used. When anthropological collections, ornaments, industrial or agricultural products are continuously damaged by molds and fungi, they can also be fumigated.
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