Originally Posted by Stephen Benskin
Here is my reasoning. All textbooks on emulsion making omit items or commit errors. All! And, the art of emulsion making is dying out and may soon be gone. Therefore, I am trying to teach as many to make and coat as possible. I may not get it all right and I may not reach all those interested, but I am trying.
And, part of the art includes photographic system engineering. That is why I devote some time (for those students interested), to this art, otherwise it will be lost.
So, that is the workshop rational. As to how it is used, it does pertain to H&D curves and the use (or lack thereof) of the zone system. It just is not needed.
For those who have been listening and recognize the limits of paper prints, go take another look at the Haist diagrams and now I will add more. ECN has contrast one full 0.1 lower than the Portra family, and more latitude. The ECP can yield a Dmax of up to 5.0, and thus these two products approach the ideal in photographic image capture.