Maintenance method: 1. Newly made mammoth ivory products: use the maintenance oil pan once every morning, noon and evening for half an hour. After that, the maintenance cycle can be gradually shortened and reduced.

2. After half a month: first wipe it with cotton cloth for half a month, once every morning and evening, 20 minutes each time, lasting for half a month.

3. After half a month's kneading period: play with your hands for half a month (hands can not only play the role of fine grinding, but also play the role of warmth and moisture, and sweat and grease secreted by your hands can also accelerate the progress of playing with ivory products). Methods: Wash and dry your hands, and rub the mammoth ivory products evenly with your thumb and palm with three forces in turn until your palms are wet and sweaty. It's still 20 minutes in the morning and 20 minutes at night.

4. Repeat the above steps until the patina is formed. When not playing or wearing, the mammoth ivory products should be evenly oiled and maintained, then put in a sealed container and placed in a cool place.