Originally Posted by Ole
It would be interesting to know what dyes Herr Dr. Vogel tried and rejected about a century ago, before he finally managed to make an orthochromatic emulsion...
Vogel started his experiments with Korallin. Later, he introduced Eosin and Azaline (mixed of Cyanine and Chinolin red).
The use of Erythrosin goes back to Eder.