I don't believe double coating cyanotype does anything to improve the image
unless not enough
sensitizer was used during the first coat. I have found that using 2 parts A
to one part B does
improve Dmax and contrast range. Have you tried this?
Bob Schramm
Check out my web page at:
<br><br><br>>From: ryberg <cryberg@comcast.net><br>>Reply-To:
alt-photo-process-l@sask.usask.ca<br>>To:
alt-photo-process-l@sask.usask.ca<br>>Subject: I'll never double coat
cyano again -- was what I've learned about cyanotype thru PDN<br>>Date:
Mon, 06 Jun 2005 15:06:35 -0700<br>><br>>Several of you have said that
double coating increases DMAX. I had always<br>>believed that. But the
tests I showed yesterday led me to doubt it. I<br>>exposed pairs of
Stoufer strips, one on single coated cyano, one on double<br>>coated. I
did six exposure times. All of these showed the same or better<br>>DMAX
with single coating. Further, the single coat always showed a
longer<br>>scale. You can see the results on my web page--I added these
new tests at<br>>the end of the earlier cyano note.<br>> I HOPE
that I have optimized the images for the web and that it won't<br>>take
too long for a dial-up, though the final image of the 6 pairs is
pretty<br>>big.<br>>
http://home.comcast.net/~cryberg/index.html<br>>Thanks, Charles Portland
OR<br>><br>
Received on Mon Jun 6 20:29:56 2005
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