Re: inkjet negative density with Epson 2200 printer

Hi Sandy,

I think the original issue was whether or not the Color Density Range Palette
(CDRP) would provide sufficient density with processes involving very long
exposure scales, such as "Salt prints, Van Dyke, & Albumen" and the issue was
not directed to Platinum & Palladium or most other processes, for which there is
more than sufficient density in the standard Color Density Range Palette.
The other related issue I believe is that these three processes do not offer a
means of contrast control, which would allow you to shorten the exposure scale
just a bit to achieve perfect results with the CDRP.

At this point, I would recommend the fix that you and Sam worked out as a
good approach when the other means fail to achieve enough ink/negative density.
This is providing, of course that the Standard Printing Time is accurate and
not set greater than it should be—this would very easily cause a failure to
achieve paper white or near paper white.

Mark Nelson
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In a message dated 12/27/04 4:34:41 PM, sanking@clemson.edu writes:

>
> Go to http://www.apug.org/forums/showthread.php?t=10922 and you will find
> information on how to blend black ink with the colors on the PDN palette to
> produce more UV density than is possible by any combination of colors on the
> palette itself.
>
>
>
>
> Sam Wang and I actually worked this out and made a working template that
> allows you to change the UV printing density merely by changing the opacity of
> the black blending pigment and I have tested it myself so I know that it
> works. By varying the opacity you can print with UV density ranging from about 2.3
> up to as high as 3.0 from digital negatives made with the Epson 2200.
>
>
>
>
> I belive that blending black with the other colors of the palette is a
> better approach than increasing the amount of ink that is laid down because with
> some color the latter approach may result in puddling and  the dreaded pizza
> wheels.
>
>
>
>
>
>
>
> Sandy
>
>
Received on Tue Dec 28 12:20:54 2004