[alt-photo] 3 color gum and PDN

[Johnny Brian]

Thanks for all of the helpful comments about 3 color gum and PDN. I may be a little over obsessive about calibration with gum printing, but when I went through the calibration process several times for monochrome gum printing it made a significant improvement in my prints. Hopefully I'll have some time over the winter to work more on the process. 

Johnny Brian