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

Hi Charles

You have done a very nice work.

I just don't agree with your conclusions. From your scanned 6 pairs I think
you can see that double coat gives you higher Dmax and less sensitivity
(longer exposure times!).

I think your Double 22 min still is underexposed.

I think for cyano your tonal range is to short - you should be able to print
at least 10 - 12 step.

please correct me if Im wrong!

Roman

----- Original Message -----
From: "ryberg" <cryberg@comcast.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, June 07, 2005 12:06 AM
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
>
>
Received on Tue Jun 7 00:29:14 2005