From: Loris Medici ^lt;>
Date: 11/07/05-07:01:30 AM Z
Message-id: <001e01c5e39b$5f62be70$f402500a@altinyildiz.boyner>

Hi Bob,
Probably you brushed the emulsion so delicately (when compared to foam
brushes) that the paper couldn't absorbed enough coating solution
(because it wasn't forced into the paper) and the sensitizer
crystallized on the surface (classic cyanotype loves to do that), then
washed away in the rinse water leaving white spots in the print. How
much sensitizer did you used on what paper? (Not that I know many
papers) I'm asking this because you may also have used too much
sensitizer (which gives exactly the same result as I described above)...
I use around 1.6ml (40 drops with the plastic pipettes I use) sensitizer
per 8x10" when coating with a brush (1ml when coating with a rod).
BTW, how you apply the emulsion on the surface is a very very important
factor IME... We had mixed results with the same emulsion, same paper,
same negative, same lightsource and same brush in a workshop; it even
depends on who is brushing! ;)
Anyway, I'm happy that you have a method (coating with a foam brush)
that works for you perfectly.
-----Original Message-----
From: BOB KISS []
Sent: 07 Kasım 2005 Pazartesi 14:40

            Here are some observations about coating classic cyano. I
have always used a very soft foam brush and mixed 2 parts of A to 1 part
of B. Good D-max and nice tones (see "Blues in Paradise" on my
website). I use Arches Aquarelle hot press almost exclusively for
Just for kicks I tried coating using a new, unused, hake brush, same
mix, same paper, same negative, same everything. The three separate
tests I did all had a very grainy look. I then coated with the foam
brush, again same everything, and got a lovely smooth image as I always
do with the foam brush. All done on the same day.
I don't know enough about the process to suggest why but the results are
amazingly different and all factors except the brushes are the same. Go
Well, for cyanos, it will always be foam brushes for me!
 Please check my website: <>
Received on Mon Nov 7 07:02:45 2005

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