Quote Originally Posted by Photo Engineer
This formula assumed, as they did at the time, that you were using standard (ACTIVE) photo gelatins, and you will be lucky if you get ISO 3 - 6 with it using modern oxidized photo grade gelatins. You cannot get active gelatins that are any good today, for the most part.PE
Can an active gelatin be made from the gelatins we can get today? I'm guessing it would be very difficult, but I'm curious how it would be done.