RE: Quadtone Inks & Digital Negatives

 
Sorry for replying in place of Joe but I also had some experience with a
dye based printer (Epson 890) and cyanotype (which needs a much flatter
negative compared to Vandyke/Kallitype). The negatives from the 890 were
so flat (in other words; the dMax of the negative was so low) that the
higlights were exposed considerably before the emulsion under clearest
parts of the negative reaches dMax (and this is was with Cyanotype which
is a more contrasty emulsion compared to Vandyke.)... I think my problem
was a combination of inadequate maximum density (UV blocking capacity I
mean) with dye inks and my inability do make a good working curve for a
colorized negative using these inks.
 
Regards,
Loris.
 

-----Original Message-----
From: Ender100@aol.com [mailto:Ender100@aol.com]
Sent: Friday, February 06, 2004 8:33 AM
To: alt-photo-process-l@sask.usask.ca
Subject: Re: Quadtone Inks & Digital Negatives

Joe,

I'm not sure I understand your post correctly, Your highlights are
printing too dark and your shadows are not printing with enough density?
At first it sounded like you might be over exposing, but I'm not sure
based on your comments. Are you able to get maximum black but your
highlights are too dark?

I think the confusion for me is that in your second paragraph and in
your last paragraph it is not clear to my pea-brain when you are
referring to your negative and when you are referring to your print.

Are you printing a Stouffer or other standard stepwedge along side the
digital negative? If so, what step gives you paper white and are any of
the lower steps-1,2,3 etc merging?

Are you pre-soaking the Stonehenge in Oxalic Acid before printing?

Mark Nelson

In a message dated 2/6/04 12:01:14 AM, dalaibobra@houston.rr.com writes:

I am currently trying to create digital negatives on a Canon s9000 using
Lyson Quad Black neutral inks with NO SUCCESS.

The inks are dye-based, not pigment; and adhere/print beatifully to Agfa
CopyJet, but don't appear to be able to block enough light and I just
can't seem to build up enough density.

I have only used thos setup once and will be testing this weekend
further.

I am using these negs for VDB & Kallitype on Fabriano Uno & Stonehenge
Rising White, exposed under BLB 48" tubes for 4-9 minutes and in all
cases the highlights stained heavily long before reaching max black.
Very frustrating.

-Joe
Received on Fri Feb 6 01:07:21 2004