U of S | Mailing List Archive | alt-photo-process-l | RE: Lagrange cyanotype

RE: Lagrange cyanotype

Have to correct a mistake I've made below:

The iron salt used in -Rex is not Ammonium Iron(III) Oxalate as in
Lagrange formula -> so it's not essentially Cyanotype-Rex...
Nevertheless, results seem to be similar according to Stane's
description ;) Perhaps that's the fact which caused the confusion in my

Sorry for the inconvenience.


-----Original Message-----
From: Loris Medici [mailto:mail@loris.medici.name] 
Sent: Friday, August 10, 2007 1:47 PM
To: alt-photo-process-l@usask.ca
Subject: RE: Lagrange cyanotype


This is essentially what our TK calls "Cyanotype-Rex" - except for
slightly different solution strengths. I had bad luck with this type of
formula: strange tonal response (flat and grainy midtones, stair-like
H&D curve) + blue stained highlights (maybe you'll find staining is less
by separating solutions).