RE: CYANO OBSERVATIONS

 
I see... When I coat by brush, I measure the right amnt. of sensitizer,
pour it on the paper and then spread it with the brush (which is
moistened with distilled water). I don't dip the brush into
sensitizer...
 
Oops! I should have missed the section where you name the paper :)
 
Regards,
Loris.
 
-----Original Message-----
From: BOB KISS [mailto:bobkiss@caribsurf.com]
Sent: 07 Kasım 2005 Pazartesi 15:12
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.
 
Received on Mon Nov 7 08:48:44 2005