[alt-photo] Re: Alternatives to Ferric ammonium citrateforCyanotypes?

[Loris Medici]

Hi Cor,

That comment was omitting the negatives; only then it makes sense... How
about a comparison with the same step tablet?

OTOH, there's still room for correction in that assertion; maybe I should
have said: "cyanotype is the slowest *iron* process". (Still, I don't know
any other - relatively well known - alt. process which the emulsion speed is
slower than trad. cyanotype...)

Regards,
Loris.


-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf Of
C.Breukel at lumc.nl
Sent: Thursday, February 03, 2011 11:14 AM
To: alt-photo-process-list at lists.altphotolist.org
Subject: [alt-photo] Re: Alternatives to Ferric ammonium
citrateforCyanotypes?

> ...
>     - is considerably faster (~ 2/3 - 1 stop, YMMV - that may be 
> important in some circumstances, especially when you know cyanotype is 
> the slowest alt. process...),

Well I am not sure about that Loris, when I print pure platinum with Pyro
negatives I lately ran into 60-90 minutes exposure on my UV bank (these
negatives are too dense for Cyanotype).

Cyanotypes with the proper negatives ran into 5-20 minutes exposure on the
same unit.