What Can't Ultrasound Clean?

1. The coated glasses in glasses are not suitable and may damage the coating, but now most of them are resin glasses, so it is better to ask about the materials of glasses before use.
2. Organic gemstones, such as pearl coral, amber, honey wax, ivory, etc;
3. Gems: mainly refer to colored gemstones, such as ruby, sapphire, tourmaline, emerald, garnet, etc., which cannot be cleaned by ultrasonic machine to avoid damage or fragmentation of gemstones.
4. Jade: mainly refers to jadeite, Hotan jade, chalcedony, etc., which should not be washed in the ultrasonic machine, and the cracks inside are easy to be broken. So we really need to consider the products when we consider buying the ultrasonic cleaner to wash the products, so as to avoid the loss of washing.