Alex Benjamin
Subscriber
I have no idea how you would keep track of all those manipulations. What a tedious job of printing that would be.
Maybe tedious, nevertheless essential. These prints are not for personal enjoyment. They are either for sale or, even more probable, for museum exhibitions. Expectation is high that they all look like the original, first print (whether by the photographer him/herself or by the first printer). For that, you need a road map as precise and well-defined as possible — even if the general printing style of the era in which it was made has changed (as well as the paper, print developer, etc.).