Abstract
Most amorphous substances change their physical and chemical properties on illumination. The photosensitive solubility permits the use of amorphous arsenic sulphide as evaporated photoresist. An appropriate solvent was found which fully dissolves the exposed areas without affecting the unexposed ones. Thus extremely thin layers of evaporated amorphous arsenic sulphide can be used as sensitive photoresist with high resolution for the production of chromium masks and sensitized offset printing plates.
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