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Subject: photo layer coming off

From: "dave_donlan" <dhd01@...>
Date: 2013-05-12

Hi guys
I am using UV exposure method on clear acetate

15 secs exposure caustic soda developer about a 60 secs

hydrochloric acid / peroxide etchant no bubbler just sloshing about but the problem is the protective layer is coming off after a few minuets of etching

hydrochloric is 30%
peroxide is 9%

Any advice please
Dave