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Tag: Darkroom
Darkroom Days
Darkroom Days
Coating
Preshrinking
Gum Bichromate Printing: Squeegeeing gelatin
RGB vs CMYK negatives
March 31, 2019
paulivanushkaphotography-blog asked: when working with cmyk print, at what point in time do i change my finished file to cmyk? or do work post prod in cmyk if iam going to mske a cmyk gum print?
I only use RGB, but if your going to make CMYK negs, I think perhaps you should work in CMYK mode from the start or better yet convert to CMYK right before you Multichannel.
Difference between Ammonium and Potassium Dichromate
March 31, 2019
darkroom-dave asked: Hey Tony, I was curious about the differences between potassium bichromate and ammonium bichromate and why you use the later.
I find the Potassium Dichromate doesn’t dissolve as well as the Ammonium Dichromate. Apparently, Potassium Dichromate produces less contrast but I can control the contrast in my print by varying the ration of Gum Arabic to Sensitizer using Ammonium Dichromate.
Applying cyanotype emulsion
August 21, 2018
ricsol62 asked: Hi,how do you apply cyanotype emulsion over a gelatin sized paper to make the first pass? Or do you size after the cyanotype layer is on?Incredible job, by the way…
I apply the cyanotype emulsion over the sized Rives BFK using a foam brush. I haven’t had any trouble coating or having the emulsion wash off.
Sink
August 21, 2018
nonmetametric asked: Tony, Where did you find the flat SS sink? Everyone on I look at is way to deep…
I salvaged the flat SS sinks from a science lab at Queens College where I teach. They were going to get rid of them.