The potassium bromide replacement is the PVP, right? It seems like other antifoggants could be tried---for that matter, is it obvious that one couldn't dissolve KBr in something else like glycerin first? But one would need to do *something* for fog control, certainly.
IIRC the PVP is used to prevent sludgng in commercial processing machines.
For the formula in the US Patent. The role usually playerd by potassium bromide in HC-110 is accomplished by the diethanolamine hydrobromide. The antifoggant is benzotriazole.
Last edited by Gerald C Koch; 01-08-2013 at 01:43 PM. Click to view previous post history.
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