Again, I have had great results with benzotriazole removing yellow for from Crystal Archive C, but not Kodak paper. In the world of black and white, up to 2g/L potassium bromide was also suggested. Would this work with color paper, or would it just screw up the colors? I have some Portra paper that I would love to be able to use - I love its contrast profile, but it has a slight yellow green fog.