You are so right about the New Cyanotype chemistry being finicky about paper! I have successfully printed traditional cyanotypes on several papers I know are internally buffered though. Not sure why some work and others don't though. Maybe the internal buffering is more sequestered from the surface in some papers due to more sizing?
We do test papers in small quantities before buying larger orders, definitely. BTW, which of the papers you mentioned have you had success with using the New Cyanotype?
I had written Bergger in France and asked them about buffering in their COT 320 and heard back from them today. They say it is "internally buffered to ph 6.6 without NaOH."
Last edited by WillL; 06-08-2012 at 10:32 AM. Click to view previous post history.