Here's Erythrosine just for reference.

Ok, so if these non-ideal S.S.D. (spectral sensitizing dyes) aren't as efficient, how exactly would that manifest itself? For starters, let's pretend we have an experimental silver emulsion that is completely unsensitized and it has a speed of 100.

The 100 would apply to blue. Presumably green would be much lower (by a factor of what?) and red lower yet.

So if we remake the exact emulsion but add dye X as a "final" (is that when you add SSDs?), how would that effect our distribution of speeds in the blue, green and red portions?

I'd like to roughly understand the practical differences between SSDs like erythrosine, congo red, etcetera (old-school sensitizers) and the ideal cyanine dyes.

I realize this is a dense (in more ways than one!) post.