Gold and Jewelry Restoration Center: No.289-1-2, Jianghai East Road, Wuxi City, Jiangsu Province.

Cleaning method: when cleaning the pure gold necklace, first put the pure gold necklace into the container, then add water to the container, then add a little ammonia water, then tighten the lid, shake it back and forth vigorously, and then take it out to dry. When wearing a gold necklace, you should also maintain the button switch and drop a little sewing machine oil on the switch regularly to prevent the micro-spring in the switch from rusting.

Dirt on the surface of gold jewelry will make its luster dim. At this time, the developing powder for developing photos can be mixed with 30-40 ~ C warm water to make developing solution, and then diluted with twice as much water. Soak the gold jewelry with dirt in it for 4-6 minutes, then brush it with a soft brush to remove dirt and rinse it with clear water several times.