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Special procedures similar to firming , intensifying and mixing operations may require supplementary local exhaust air flow or respiratory safety. Because of the broad range of formulae used by varied suppliers, and totally different methods of packaging and mixing photoprocessing chemicals, only some generalizations could be made regarding the kinds of chemical hazards in black-and-white photoprocessing. The most frequent well being issue is the potential for contact dermatitis, which most incessantly arises from pores and skin contact with developer solutions. Developer options are alkaline and normally include hydroquinone; in some cases they may comprise p-methylaminophenolsulphate as nicely. Developers are pores and skin and eye irritants and should trigger an allergic pores and skin response in delicate people. [newline]Although concentrated stop baths are strongly acidic and may trigger pores and skin and eye burns following direct contact, the working-strength options are normally slight to moderate pores and skin and eye irritants.… Read More