Of the copper compounds or calips are used for a limited amount of brushing of wool. the tooth is a copper tooth of colored teeth and makes the wool blue, and if yellow wool is colored, you will be green with this tooth. The copper tooth consumes more natural colors, and it degrades from the durability of the wool and makes it rough and fragile.In the dental bath of the use of strong mineral acids such as sulfuric acid, it must be self-made because the color makes it uniform.