Re: Scanning old Balck and White Prints
Re: Scanning old Balck and White Prints
- Subject: Re: Scanning old Balck and White Prints
- From: Barry Gorrell <email@hidden>
- Date: Mon, 12 Feb 2001 02:39:05 -0500
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on 2/11/2001 15:52, Peter E Siegel at email@hidden wrote:
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> Hi user group
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>
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> I am using a Heidelberg Topaz scanner to scan 50-100 year old black and
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> white silver gelatin photographs. The goal is to reproduce these old
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> photo's density and color ( yellow-ish, brown-ish, purple-ish) as
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> accurately as possible.
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> My work flow
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> System:
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> Apple System 9.04
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> Barco reference calibrator set at 5000 K gamma of 2.2
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Which Linocolor version? Normally Barco's run at 5000K and gamma 1.8.
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> Scanner:
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> I created and I'm using a custom profile from a reflective IT-8 Q60
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> target. The profile was made with Monaco's monaco profiler to create the
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> profile. I used the generic target data file from kodaks web site.
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Generic or rather the batch text data files corresponding to the IT8 that
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your calculating the profile for. Otherwise this will NOT work.
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> Proofing:
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> I am viewing the scans in Lino Colors LAB mode and saving this as
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> "Archive Image" We are proofing against a GTI 5000k booth after scanning
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> in Lino Color LAB Mode.
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Proofing the originals or repro prints?
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> The results I get are great for color but lousey for monochromatic black
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> and white reflective originals.
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> My question, is there a target out there for monochromatic originals, or
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> should I just use Lino Colors Tiff RGB profile (which by the way gets me
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> closer to the originals appearence)? Or am I thinking about this all
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> wrong?
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If your source profile (Monaco) is good and the screen preview is as the
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scanned original then if the repro isn't good it's the destination profile
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that is incorrectly describing the press. If the screen preview is off then
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it's likely the scan profile, or less likely the Barco profile. Do you have
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media white point turned on in the Linocolor profile preferences? If so turn
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it off to see if this is causing the differences. For such important work
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you may consider Profile City's new scan profiler app that builds wonderful
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neutral input profiles.
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Let us know.
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>
--
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Neil Snape photographer, Paris. 0145578055 email@hidden site:
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http://mapage.noos.fr/nsnape
Peter,
Scanning old B+W silver gelatin prints are often difficult to scan. The
reflective quality of the crystalline silver in the gelatin print
emulsion can cause strange color aberrations on any scanner. Try
scanning them in Grayscale mode, then converting them to RGB and using
Photoshop's "Image>Adjust>Hue/Saturation" controls in "Colorize" mode to
restore the "( yellow-ish, brown-ish, purple-ish)" color. Usually a hue
value between 38 and 42 and a saturation of 10 to 16 will do the trick.
--
Barry Gorrell
Image Techniques
Email: email@hidden