Procedure to carry out stain-free cleaning of delicate materials and surfaces entails impinging carbon dioxide granules upon material or surface and then treatment of material or surface by low pressure plasma in reactor

摘要

First, carbon dioxide granules are impinged upon the material or surface to be cleaned, and then treatment of the material or surface takes place by a low pressure plasma in at least one reactor. Carbon dioxide pellets are used for impingement upon the material or surface and hit at a speed of especially between 150 and 250 m/s. The carbon dioxide pellets have a polygonal form and/or a maximum diameter of especially 1.0 mm. An Independent claim is included for a device for cleaning materials and surfaces and which has a reactor, means to produce a carbon dioxide impingement upon the material or surface, and/or means to produce a low pressure plasma.