Well, with the help of a friend, and after an exhaustive search of my Kodak literature and his German literature, we find only references to Benzenesulfinic acid as an antioxidant and generic sulfonates as wetting agents.

This is quite perplexing to find the sulfinic acids in both places as antioxidants and the sulfonic acids as wetting agents, and neither agreeing with what has gone on above. The above posts indicate that the sulfonic acids have both functions.

Either this is a "new" discovery on the part of researchers into the properties of sulfonates, or it is a very serious misprint/typo in the published literature. The materials we have come from our notes and actual usage.