from: Photographic Facts and Formulas, E.J. Wall & Franklin I. Jordan (orig. 1924) revised & rewritten by John S. Carroll 1976. ISBN:0-8174-0580-1 (Amphoto) p141
"Another approach to desensitization is to convert the silver bromides in the emulsion to iodide, which is much less sensitive to light, and allows developement of the image in bright light. This was first noted by R. Freund in 1908, and followed by extensive investigation by F.F. Renwick in 1920. If an exposed emulsion is bathed for several minutes in the following bath
Potassium Iodide 10.0g
Sodium Sulphite (dessicated) 10.0g
Potassium thiocyanate 30.0g
water to make 1.0l
it could be developed even in full sunlight, using amidol (diaminophenol) developer freshly commpounded with sodium carbonate. There is some question if this will work with modern, high speed, dye-sensitized emulsions"
I wonder if the last sentence was written by Carroll in 1976 or Wall-Jordan in 1924