Joe,
The tone/density relationship of the OHP material is very non-linear. That's
why your image looks so strange after applying the curve. By the way, don't
forget to invert the image after applying the curve. This transforms the
image from a positive into a negative.
Best Regards,
David R. Spielman
-----Original Message-----
From: Joe Thibodeau [mailto:jetcode@allvantage.com]
Sent: Friday, November 07, 2003 10:12 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Re: Contact Print Negatives
Hi David,
Thanks again for the lesson in applying curves and offering the
mapping to Silver Gelatin. It is interesting to me to examine at the
strange appearance ... this is the kind of negative that Silver
demands ... I don't have any negatives that look like this!
Joe
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "David R.
Spielman" <david@s...> wrote:
> Joe,
>
> Do the following:
>
>
> 1) With an image loaded, invoke the print with preview function
(File>Print
> with Preview
) and then,
> 2) Select the Output function from the Color Management/Output
drop-down
> list box.
> 3) Click on the Transfer Function button and enter the curve values
> 4) Save the transfer function as an *.ATF file with an appropriate
name. The
> contrast adjustment curve is now ready to be used.
>
> To apply the contrast adjustment curve involves the curves
function in
> Photoshop (Image>Adjustments>Curves).
> Click on the Load button, and select the *.ATF file type.
> Select the file name of the desired curve and its graph will be
displayed
> Don't be concerned if the resulting image looks very strange
onscreen.
> It is important that no further adjustments (tone, contrast,
brightness,
> etc.) be
> made in Photoshop after this contrast adjustment curve has been
applied.
>
>
> Best Regards,
>
> David R. Spielman
>
> -----Original Message-----
> From: Joe Thibodeau [mailto:jetcode@a...]
> Sent: Thursday, November 06, 2003 3:29 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Re: Contact Print Negatives
>
>
>
> Hi David,
>
> Thanks for the information. Very helpful if I decide to go back
into
> the darkroom ... I triedentering the curve using curves and the
> entry field gets rounded off to integers so I'm not sure how to
> enter a fractional value.
>
> Joe
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "David R.
> Spielman" <david@s...> wrote:
> > Joe,
> >
> > You can use Pictorico's OHP film or their Photo Gallery High-
Gloss
> White
> > Film.
> > Both can be used to make negatives for silver/gelatin material.
> > If platinum/palladium is your game, the OHP is your only
solution.
> > Turns out that the base material of the High-Gloss White Film
is
> UV opaque!
> > Use the photo black ink on your 2200 and print at 2880 dpi.
> >
> > I've developed the Photoshop adjustment curve below for digital
> negatives
> > used to print on silver/gelatin print material.
> >
> > In Out
> > 0% 10%
> > 5% 11.9%
> > 10% 13.9%
> > 20% 17.6%
> > 30% 21.9%
> > 40% 26.5%
> > 50% 31.5%
> > 60% 36.8%
> > 70% 43.0%
> > 80% 52.0%
> > 90% 70.0%
> > 95% 87.0%
> > 100% 100%
> >
> > Using a Epson 2200, and Pictorico OHP material.
> > Setup: photo black ink,
> > Premium glossy photo paper setting, untagged grayscale image,
> printer
> > source, same as source. Let the negative cure overnight before
> using.
> >
> > Works great!
> >
> > Best Regards,
> >
> > David R. Spielman
> >
> >
> >
> >
> > From: Joe Thibodeau [mailto:jetcode@a...]
> > Sent: Thursday, November 06, 2003 9:59 AM
> > To: DigitalBlackandWhiteThePrint@yahoogroups.com
> > Subject: [Digital BW] Contact Print Negatives
> >
> >
> >
> > To extend my art to Silver in the digital domain I want to
print
> > negatives on the 2200 for contact printing or enlargement.
Can
> > someone recommend a film to print on for such a purpose?
Sorry if
> > this topic has been rehashed a million times. I did spend
some
> time
> > searching through the archive but did not find an answer.
> >
> > Joe
> >
> >
> >
> > Yahoo! Groups Sponsor
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> >
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[Non-text portions of this message have been removed]Message
RE: [Digital BW] Re: Contact Print Negatives
2003-11-07 by David R. Spielman