The only uncoated Bergger paper we can get here is COT320 which has no Baryta coating on it, only a gelatin subcoat. This is good paper, but not the same as having the Baryta layer.
Baryta improves whiteness and improves sharpness.
I´ve got unsensitized Bergger Baryta paper llying around too. On the envelope is a sticker that reads "Museum weight glossy" and "25 11x14 in". I tried to make Cyanotypes on it but the first test was not successful -- the seizing seems to be tanned too strong by the exposed sensitizer and the image falls in pieces from the paper.
An alternative that could be interesting is (older) Ilford inkjet paper. The Ilford SMGP7NL on rolls is a RC Paper with a simple gelatine coating as far as I know. That stuff gets really sticky when wet so I think the gelatine is not hardened. Just for the records: Cyanotyping on it has similar problems like on the Bergger Baryta.
Originally Posted by Kai Hamann
Do you know if this unsensitized Bergger Baryta paper can still be purchased anywhere? There are people on this site who are good at coating unsensitized Baryta paper with platinum\palladium and they might like to give this a try. I do recall some years back that a company was selling this type of paper with a minimum order of a case. I could not recall if it was Bergger or not.
Does anyone know who the U.S. distributor is?
You can get the COT320 from the Formulary or direct from Bergger. I just bought 2 11x14 packs of 20 sheets directly from Bergger. Earlier this year, I bought some 8x10 from the Formulary. At that time, they did not have the 11x14 so I went direct to Bergger.
I have found that the original order of 8x10 accepts an emulsion coating differently than the newer 11x14. The 11x14 repels the gelatin more than the original 8x10 sheets, and the new 11x14 is in a white package whereas the 8x10 is in a brown pack with a different Bergger logo on it.
Both are quite good, but the newer batch is just not quite as good IMHO.
Can you give me the contact info for Bergger?
Originally Posted by Photo Engineer
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Try the above Mike
Thanks. I got hold of John and had a nice discussion with him. I have started a new thread that should be of interest to everyone on this thread. Please jump in and make comments:
I just tried this on a cyanotype on Crane's 90lb, and it worked well! Looks nice, kind of like airdried glossy fiber, and deepens the maximum density.
Originally Posted by McPhotoX
Since Dorland's comes in a big tub and I wanted a small amount to try first, I got Gamblin Wax Medium instead. I was told it's about the same.