RE: CYANO OBSERVATIONS

 
Kate, if the reason was the sizing of the brush, then it would only
affect the first, maybe the second print... By the time of making the
third print the sizing would have left the brush. (Assuming Bob rinsed
the brush and mixed fresh coating soln. for each print - BTW, do hake
brushes come with a sizing as with watercolor brushes?)
 
Bob, If you dried the paper in the same conditions (temp. and humidity)
+ for the same time as the foam brush coated ones, and now think it
didn't dry completely, then this indicates that you've used too much
emulsion on paper (= crystallization = flaking of emulsion = grainy
look, see my first message). If the amnt. of soln. applied with the hake
brush was equal to the soln. amnt. applied with the foam brush, then
both papers would be equally dry by the time of printing - giving good
results.
 
What do you say? Do you buy this explanation? ;)
 
Regards,
Loris.
 
-----Original Message-----
From: BOB KISS [mailto:bobkiss@caribsurf.com]
Sent: 08 Kasım 2005 Salı 15:32
To: alt-photo-process-l@sask.usask.ca
Subject: RE: CYANO OBSERVATIONS

DEAR KATE,
            I think I didn't let the paper dry completely. The Hake
brush was a virgin and had nothing in it.
                        CHEERS!
                                    BOB
 
 Please check my website: <http://www.bobkiss.com/>
http://www.bobkiss.com/
 
-----Original Message-----
From: Kate M [mailto:kateb@paradise.net.nz]
Sent: Monday, November 07, 2005 3:59 PM
To: alt-photo-process-l@sask.usask.ca
Subject: RE: CYANO OBSERVATIONS
 
Makes me wonder if the brush didn't contain some chemical sizing that
interfered with the cyano......just my 2 cents worht :)
Kate
-----Original Message-----
From: BOB KISS [mailto:bobkiss@caribsurf.com]
Sent: Tuesday, 8 November 2005 2:12 a.m.
To: alt-photo-process-l@sask.usask.ca
Subject: RE: CYANO OBSERVATIONS
DEAR LORIS,
            I don't recall exactly how much sensitizer I used but I use
the same very small beaker filled to the bottom line for both the foam
and hake brushes. As mentioned in my original e-mail I used Arches
Aquarelle HP.
                        CHEERS!
                                    BOB
 
 Please check my website: <http://www.bobkiss.com/>
http://www.bobkiss.com/
 
-----Original Message-----
From: Loris Medici [mailto:loris_medici@mynet.com]
Sent: Monday, November 07, 2005 9:02 AM
To: alt-photo-process-l@sask.usask.ca
Subject: RE: CYANO OBSERVATIONS
 
 
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.
 
Regards,
Loris.
 
-----Original Message-----
From: BOB KISS [mailto:bobkiss@caribsurf.com]
Sent: 07 Kasım 2005 Pazartesi 14:40
To: alt-photo-process-l@sask.usask.ca
Subject: CYANO OBSERVATIONS
DEAR LIST,
            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
cyano.
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
figure!!!
Well, for cyanos, it will always be foam brushes for me!
                                    CHEERS!
                                                BOB
 
 Please check my website: <http://www.bobkiss.com/>
http://www.bobkiss.com/
 
Received on Tue Nov 8 08:30:55 2005