For those interested, here is the wedge spectrogram of the ortho film. The sensitizing dye was erythrosine.

It was an example on paper from a different run of the emulsion.

I'm sorry to say, the only film sample from this run with a wedge spectrogram was from a defective piece of film, and the only paper sample from this run was ruined because the shutter on the spectrosensitometer hung up.

The image was done with no UV absorber, so you see the full UV sensitivty on the left of the image out beyond 400 nm and on the right, you see some indication of red sensitivity, but this is actually an artifact of having no UV absorber. It is a harmonic of the UV.

Ah well, nothing is perfect.

PE