The Kristall 620 is a fully automatic polisher and etcher. Polishing and etching voltage as well as time are all variable. If so required, the polishing voltage can be doubled. Optional selection between a polishing sequence i.e. polishing or etching/automatic polishing or etching. Kristall 620 The strength of the current can be restrained through the limit setting function. The speed of the amount to be pumped is also variable. For special applications, there is the possibility for connecting an external etching unit.