From: Leonard Peterson (windpoint@hotmail.com)
Date: 01/27/03-03:09:41 PM Z
Mike, What are you referring to in your message "Palmer's 14 "test
correction curves" (Barnier,
>p. 233)"? Thanks from a novice in this world. Len
>From: Michael Healy <mjhealy@kcnet.com>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Curves on home-brewed digital negatives
>Date: Mon, 27 Jan 2003 13:05:07 -0700
>
>
>----- Original Message -----
>From: "H. Lee Pratt" <squnch@cox.net>
>To: <alt-photo-process-l@skyway.usask.ca>
>Sent: Monday, January 27, 2003 11:25 AM
>Subject: Re: introduction and request for info on digital negatives
>
><snip>
>
>Second: I too have an Epson 3000, which I have dedicated to b&W work,
>using the PiezographyBW drivers and inks. My understanding at this
>point is that you only need a "curve" if you are making a contact
>negative through a service bureau = using lithographic film. I doubt
>you will need any curve to make a desktop negative on your Epson, as
>you can simply invert your final image to a negative and print it to
>your 3000 on Pictorico OHP film. (Epson transparency film does not
>work, but the Pictorico product does.) If your positive looks good on
>the screen, the negative will probably print well on #2 paper.
>
><snip>
>
>I am inclinded to disagree with you about curves on desktop negs. I also am
>new to making my own desktop negs, but here's what I find: the same neg
>does
>NOT give the same printing outcome with argyrotype that it gives me with
>cyanotype. Different processes, different papers, so maybe it should be
>self-evident. Definitely not the same results at all.
>
>What I did when I first started this homebrew negative stuff was to input
>(in Photoshop) every one of Palmer's 14 "test correction curves" (Barnier,
>p. 233). Then I applied every one to a different copy of Burkholder's
>digital step tab. Finally I copied all of these onto a single 8x10 PS file,
>which I printed on acetate. If you do that, and print with this, I think
>you're going to be in for a surprise. It was a really tedious project, but
>there is no better argument for the need of curves on your desktop negs.
>
>Mike
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