U of S | Mailing List Archive | alt-photo-process-l | question about gum curves

question about gum curves

Do you folks who curve each gum color individually find that a curve for one red is pretty much the same as for another red? Or do you need to make individual curves for each pigment? And, what about paper--do you need different curves for one pigment depending on which paper you use?
Thanks in advance.
Charles Portland OR