RE: Argyrotype and Bergger COT 320

Hi Christina,

-----Original Message-----
From: Christina Z. Anderson [mailto:zphoto@montana.net]
Sent: 04 Nisan 2006 Salı 16:56
To: alt-photo-process-l@usask.ca
Subject: Re: Argyrotype and Bergger COT 320

CA:
I do not get any bleeding with argyrotype but I did mix up my formula to

include Tween in it, as Ware recommends. I added 10 drops of 50% Tween
20
per 100 ml (I wish Tween wasn't called Tween 20 because i assume it is
20%
when it is not). However, I will NEVER do that again--mix the Tween
into
the bottle of formula--because certain papers need more or less Tween
than
others. But I sure do not have any coating problems with argyrotype
that I
have noticed since I did it that way.

LM:
Will try to use less sensitizer next time. I was obvious that the amnt.
of sensitizer was too much in that test. Will also try to use Ilfotol
and/or PhotoFlo. The trials I've done with Ilfotol and Classic Cyanotype
didn't exhibit any problems (2-3 years ago).

CA:
Also, I found it weak on Platine, and whether that was because of lack
of
humidity (it runs about 15-20% here in the winter) or that Platine is
unsuitable for argyrotype as my notes have suggested, I have not gone
back
to prove. It looked a weaker, grayish brown color instead of the deep
rich
bittersweet that it should be.

LM:
Could it be that COT320 is the aquapel sized version of Arches Platine?
If I'm not wrong Platine is a gelatine sized paper...

CA:
I never found argyrotype to lack in the dmax department in general
(aside
from this Platine thing), which I do with VDB at times. I never double
coat.

LM:
It's incredible - compared to my Vandyke experience. But the color is
distinctly different. Will try it few more papers (Whatman Watercolor
and Masa - when it arrives)...

CA:
I gave the students their midterm a couple weeks ago. It was odd for me
to
have test questions on Mark Nelson and Mike Ware and actually be able to

talk/email to the people I am writing tests about :) I have to give them

kudos because they have got the digineg part loud and clear. But for
some
unknown reason they didn't test as well on the "gum myths" section.
Hmmmm...something's wrong with this picture.

LM:
;) Yes, there's definitely something wrong in that...

Regards,
Loris.
Received on Tue Apr 4 10:31:28 2006