The ivory is a male elephant's fangs, often processed into art, jewelry or jewelry, and it is also processed into billiards and piano keys, which is a very expensive raw material. Nowadays, in order to protect animals, the ivory trade is banned or resisted internationally, but some Tibetan friends keep ivory products left in their early years, such as ivory chopsticks. How to keep such chopsticks? The ivory is composed of calcium phosphate and organisms. When the temperature is extremely variable and too dry, the ivory will crack, age and embrittle. Therefore, the maintenance of ivory products must pay attention to the following aspects: 1. The ivory product can be placed in a soft pouch box and put on a sputum-proof medicine block. The storage environment should be kept as constant as possible. 2. Ivory products are particularly sensitive to changes in humidity. Because it not only contains a certain amount of water, but also has water absorption, it will absorb or release water as the environment changes, and the volume will expand or contract. Therefore, when storing ivory products, the relative humidity of the surrounding environment should be maintained at 55% to 60%. It is simple to keep a cup of water in the vicinity. Can not be placed in a windy place. 3. For the dust on the surface of ivory products, brush it with a brush, but if it is stained with oil or stubborn dirt, it needs to be gently scrubbed with warm soapy water, and then dried in time to prevent the utensil from lifting or opening.
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