From: Joachim (joachim@microdsi.net)
Date: 10/15/01-11:50:00 AM Z
It is timely for me to repeat my post of several years ago on this subject:
I played with the combination as I found a fascinating interaction between
the two at their interface. As the Van Dyke "digested" the Cyanotype, the
interface where the two blended was just plain magical. However, it must be
recognized, as it was almost 100 years ago, that the chemical reaction is
universal, predictable, and not reversible. I found that extremely feeble
concentrations of cyanotype worked best so that the rate of reaction was
manageably slowed. I also found that reapplication and repeat printing over
the same image was successful in slowing the degradation markedly but that
approach nearly always doomed the project to mechanical failure. (It would
be pointless to dig out my old records as your experimentation will have to
differ). I next photographed (conventional film) the resultant image as a
way to save a fugitive reaction, generated a digital file, and output the
resulant picture on watercolor paper. The result was quite acceptable, but
it was tedious, costly, and obviously one generation removed from what we
would have wished. I also used a combination of cyanotype with palladium
where that oxidative reaction with silver chloride does not occur. The
results have been quite decent, but without the same magic. If you, or
anyone, finds a way to stabilize the reaction I would love to know it.
Perhaps if I were a better chemist, or alchemist, but that subject is on my
long list of inadequacies. Joachim
> -----Original Message-----
> From: Keith Gerling [mailto:kgerling@ameritech.net]
> Sent: Monday, October 15, 2001 10:19 AM
> To: alt-photo-process-l@sask.usask.ca
> Subject: RE: Kallitype over Cyanotype?
>
>
> No, I didn't add sizing. I was hoping I'd be able to avoid the sizing
> hassles. I'll run a test the next time I size a batch of paper. Thanks!
>
> Keith
>
> -----Original Message-----
> From: Alberto Novo [mailto:alnovo@inwind.it]
> Sent: Saturday, October 13, 2001 4:20 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: R: Kallitype over Cyanotype?
>
>
> ... and did you size between cyano and VDB?
> Alberto
>
> -----Messaggio originale-----
> Da: Keith Gerling [mailto:kgerling@ameritech.net]
> Inviato: venerd́ 12 ottobre 2001 13.37
> A: alt-photo-process-l@sask.usask.ca
> Oggetto: RE: Kallitype over Cyanotype?
>
>
> Well, I mixed up a batch of Van Dyke Brown emulsion and spread it
> over some
> pretty dense cyanotypes. The results, using the straight solution and the
> 1:1 water mix suggested by garimo were both disasters. I could probably
> handle some bleaching, even a lot of bleaching if it were consistent, but
> what I got was a very mottled and streaky result that looked horrendous.
>
> -----Original Message-----
> From: Keith Gerling [mailto:kgerling@ameritech.net]
> Sent: Thursday, October 11, 2001 1:59 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: RE: Kallitype over Cyanotype?
>
>
> Hi garimo,
>
> The kallitype formula I used was Silver Nitrate and Ferric Oxalate. I'll
> try using Van Dyke brown when I get a chance to mix a batch.
>
> Thanks!
>
> -----Original Message-----
> From: garimo [mailto:omirag@cruzio.com]
> Sent: Thursday, October 11, 2001 1:04 PM
> To: alt-photo-process-l@sask.usask.ca; Alt-Photo-Process-L
> Subject: Re: Kallitype over Cyanotype?
>
>
> >It seems that I read somewhere that it is possible to print
> kallitype over
> >cyanotype. Has anybody had any luck with this? I'm finding that the
> >kallitype emulsion bleaches the cyanotype immediately when it is applied.
> >I'm using the traditional cyanotype formula.
> >
> >Keith
> Don't know if by kallitype you mean the same formula as Van dyke
> Brown... but I dilute the VDB solution in half(1:1) with water. I tried
> other dilutions but I liked the 1:1 best. Different exposure times of
> the VDB have different effects in the final print.
> good luck!
> garimo
>
>
>
>
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