[Alt-photo] PAPER QUESTION FOR TWO PROCESSES

bobkiss caribsurf.com bobkiss at caribsurf.com
Sun Sep 3 16:19:23 UTC 2017


DEAR CHRISTINA, 

COT 320 has been my standard paper for many years and I have already extensively tested it. I am testing papers I haven't used yet for my APIS presentation as I bet you are as well. 
good to get corroboration about no need for acidification. 

CHEERS! 
BOB 




From: "alt-photo-process-list at lists.altphotolist.org" <alt-photo-process-list at lists.altphotolist.org> 
To: "alt-photo-process-list at lists.altphotolist.org" <alt-photo-process-list at lists.altphotolist.org> 
Sent: Sunday, September 3, 2017 10:49:15 AM 
Subject: Re: [Alt-photo] PAPER QUESTION FOR TWO PROCESSES 

Bob, 
I agree with Denny. These papers are all fine with no acidification. 
And they’re all wonderful papers. 
You don’t have Cot 320 on there? 
I am in paper testing mode along with you as we speak. I’ve got a stack of paper, vellums and some of the pad papers that people say are really good. 
I came across this from the list years ago: 
“ Slower papers are redder, perhaps because alkalinity is converting some of the Prussian blue to ferric hydrate which is brick red." Peter Friedrichsen 
I find this an interesting proposition, because there is one thing to acidity/alkalinity to papers and another to the color of the completed cyanotype on papers. Some papers will be more purple, some more blue and some with a hint of green. HPR leans to green. 
It’s Fabriano that is sort of sucky with cyanotype though I printed it all the time for gum overs. 
Chris 



On Sep 2, 2017, at 4:14 PM, bobkiss caribsurf.com via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote: 

DEAR LIST, 

I am about to do some extensive testing of some papers. My question is regarding two different processes; Cyanotype and Pt/Pd printing: with which, if any of the following papers have you found it necessary to treat them in acid to remove buffers before use in these two processes? I believe each of the manufacturers say that their papers are not buffered but "One never know, do one?" I am most concerned about the results with Cyanotype. 

Hahnemühle platinum rag 

Arches Platine (either weight) 

Revere Platinum 

Cranes Cover 90 lb wove 

Thanks in advance... 

CHEERS! 
BOB 


[ http://stores.photoformulary.com/cranes-cover-90-lb-wove-finish-alternative-printing-paper/ ] 
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