RE: Toning the Cyantoype

what amounts of sodium carbonate or ammonia do you use?

Loris Medici <mail@loris.medici.name> wrote: Maybe you're using too much tannic acid (I use one full dessert spoon per litre... or the paper is not adequate; some papers stain more than others). Do you clear your cyanotypes in citric acid after development (and wash again)? IME, if I treat cyanotypes in citric acid after the first wash (read as development) I get a much more contrasty image (cleaner, white highlights - otherwise, the highlights are low contrast and I can't get paper white) and much less staining (if any... in my case it's not noticable *unless compared side-by-side with non-treated paper*).
   
  Regards,
  Loris.
    
  -----Original Message-----
From: David & Jan Harris [mailto:david.j.harris2@ntlworld.com]
Sent: 20 Nisan 2006 Perembe 15:38
To: alt-photo-process-l@usask.ca
Subject: Re: Toning the Cyantoype

  I find that even tannic acid stains the paper significantly, in fact there doesn't seem to be much difference in staining between tannic acid and green tea. The colour is a little different though (tannic acid is pinker which I find more pleasant).
   
  Dave
    ----- Original Message -----
  From: Loris Medici
  To: alt-photo-process-l@usask.ca
  Sent: Thursday, April 20, 2006 12:10 PM
  Subject: RE: Toning the Cyantoype
  

  What is your bleach? Mild alkalis such as sodium carbonate, ammonia, borax all work well as cyanoype bleaches. If you're mentioning ordinary Sodium Hypochlorite bleach, it's no good for bleaching cyanotypes...
   
  BTW, Toning with tea will stain the paper considerably, if you can find tannic acid it would work much better, without staining...
   
  Hope this helps,
  Loris.
    
  -----Original Message-----
From: trevor cunningham [mailto:tr_cunningham@yahoo.com]
Sent: 20 Nisan 2006 Perembe 09:46
To: alt-photo-process-l@usask.ca
Subject: Toning the Cyantoype

  Wicked cool...found a bunch of toning recipes and tools to get me started: tannic acid from tea bags (are earl grey, ceylon, or green tea variations important to note?), instant coffee, and lead acetate...I have all three of these and access to loads of household bleach...does the lead acetate tone require bleaching? my stack of cyanotypes awaits...
   
  Enjoy...Trevor Cunningham

"The optimist believes this is the best of all possible worlds.
 The pessimist fears it's true" - J Robert Oppenheimer
 
http://www.geocities.com/tr_cunningham

                
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Received on Thu Apr 20 07:01:54 2006