RE: I'll never double coat cyano again -- was what I've learned about cyanotype thru PDN

I would expect longer exposure times with double coating as cyanotype is
self-masking. Is this cyanotype I or II?

Kate

-----Original Message-----
From: ryberg [mailto:cryberg@comcast.net]
Sent: Tuesday, 7 June 2005 10:07 a.m.
To: alt-photo-process-l@sask.usask.ca
Subject: I'll never double coat cyano again -- was what I've learned
about cyanotype thru PDN

Several of you have said that double coating increases DMAX. I had
always believed that. But the tests I showed yesterday led me to doubt
it. I exposed pairs of Stoufer strips, one on single coated cyano, one
on double coated. I did six exposure times. All of these showed the
same or better DMAX with single coating. Further, the single coat
always showed a longer scale. You can see the results on my web page--I
added these new tests at the end of the earlier cyano note.
    I HOPE that I have optimized the images for the web and that it
won't take too long for a dial-up, though the final image of the 6 pairs
is pretty big.
             http://home.comcast.net/~cryberg/index.html
Thanks, Charles Portland OR

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