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I've been playing around with trying to make panchromatic/orthochromatic cyanotypes by using a dye sensitization process similar to what's used in silver halide emulsions after finding a reference to adding fluorescein to the sensitizer. No luck so far though…

All of these tests were exposed inside the rainbow cardboard box and they all only responded to the blue light. At least I've got a pretty good impression of the spectral sensitivity of the sensitizer now, so that's nice I guess.

Since my fluorescein hasn't arrived yet I've been using erythrosine which is also used in normal film. It's really hard to find any kind of information on the specifics though.

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