[alt-photo] Re: cyanotype [Triangle]

[pfriedrichsen at sympatico.ca]

Just want to  make mention that vitamin c is one of the few acids 
that you will want to avoid when acidifying the paper. It can act as 
a pretty strong reducing agent and may cause the ferric to go ferrous 
prematurely and cause highlight staining. Citric acid, acetic acid 
are ok.Filtered lemon juice in a pinch!.

Peter Friedrichsen




At 07:12 PM 06/02/2010, you wrote:
>Hi Diana,
>No air conditioning, no humidity, and positively it is paper that is 
>not completely dry (overnight, paper does not dry). It has been 
>rainy for the last several days so I imagine the humidity is close 
>to 90%.  Fresh chemistry just mixed.
>
>However, as far as the paper, I used to always use BFK paper for 
>VDB, argyro, and cyanotype, and have found this year that it is no 
>longer suitable for argyrotype, it is what we've used with cyanotype 
>now, and my guess is they may have changed their sizing agent to a 
>more alkaline one.
>
>I'd have to run in town for some vitamin c tabs to test Loris' 
>advice, but have NEVER used citric for traditional cyano before, 
>only with Ware's, so this was a new one for me.
>Chris
>
>Christina Z. Anderson
>christinaZanderson.com
>
>On Jun 2, 2010, at 2:20 PM, Diana Bloomfield wrote:
>
> > Hi Trevor,
> >
> > Check out the Nasher Art Museum, on Duke's 
> campus:  http://www.nasher.duke.edu/exhibitions.php  Not alt 
> process, but interesting contemporary Chinese art exhibit right now 
> (including photographs), as well as CDS, though not sure what they 
> have going on right now.  Check out all the art galleries in 
> downtown Raleigh, some relatively new:  Flanders (South West St); 
> Adam Cave (Hargett Street-- I have alt process work on exhibit 
> there now, including some new tri-color gums); Lee Hansley Gallery 
> (Glenwood Ave); The Collectors Gallery (Fayetteville Street); 
> ArtSpace (Davie Street-- I can't stand the stuff there-- way too 
> commercial for my tastes-- but most people seem to love it); Lump 
> Gallery (S Blount Street- interesting exhibit now, featuring video 
> work); and be sure and visit the newly renovated and reopened NC 
> Museum of Art (Blue Ridge Rd)-- it's spectacular.
> >
> > All of those places have websites, so you can look them up for 
> more information.  Not much in the way of photography-- alt or 
> otherwise-- but those places above are worth visiting.
> >
> > With regard to humidity issues, I've actually never had a problem 
> with too much humidity here in NC-- believe it or not.  Where I 
> work-- in my house-- the room is cooled by air conditioning in the 
> summer, or heated in the winter.  So even though it's a very humid 
> climate, that doesn't seem to matter much.  I actually keep a 
> humidifier where I work-- so a cyanotype emulsion, for instance, 
> won't just go sliding off the paper once put in a water 
> development.  Without the added humidity from a humidifier, 
> emulsions just don't seem work all that well for me.
> >
> > I'm guessing you're not working in air conditioning up there in 
> the mountains, Chris?   I would guess it's not a humidity issue, 
> though; rather, when I get odd colors like that, the reason is 
> usually the choice of paper, or possibly expired chemistry.
> >
> > On Jun 2, 2010, at 3:43 PM, Trevor Cunningham wrote:
> >
> >> Things keep coming back to North Carolina. Here in Saudi, I have 
> NO issues with humidty, or benefit from it at that matter...unless 
> you count prints drying indoors in less than an hour as a bonus. 
> I'll be in Raleigh on the 11th. If anyone knows of something 
> interesting alt-wise or photographic in general in the Triangle 
> area over the next month, I'd love to know.
> >>
> >
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