From: Bill Collins (photo@intrex.net)
Date: 03/07/01-02:18:25 PM Z
I recently saw an old book on Cibachrome printing that showed a print made from an Autochrome, as if it were a slide. The easiest way might be to find a lab that can make an enlarged print of it, or even a contact print, the scan the print.
Bill
---------- Original Message ----------------------------------
From: ken watson <watsok@frii.com>
Reply-to: alt-photo-process-l@sask.usask.ca
Date: Wed, 07 Mar 2001 10:07:46 -0700
>HP sells a small device that in effect takes light from the additional area
>of the flatbed where the slide is not and illuminates / backlights the slide
>with this light.
>
>You can do this yourself by having two mirrors joined at about 90 degrees.
>Half over the open area , half over the slide.
>
>There may be artifacts from this but putting a diffuser behind the slide may
>fix them.
>
>When you place a mirror behind the slide the light must travel through the
>slide twice before being detected.
>
>The problem / good thing about slides is their dynamic range. The problem
>comes in the scanner sensor which can be over driven to the point artifacts
>show up from the scan. If scanned at to low light level you loose
>information that is in the slide. If you are just scanning to get a
>recognizable image try the slide adapter. Check out HP's site for help.
>
>Using another light source other than the one in the scanner creates
>problems of color balance. Just before scanning the light is turned on and a
>reading is taken of a known white area. This is used to calibrate the
>sensor. In addition you will notice that the light in the scanner looks to
>be blue. This is because the scanner's sensor is less sensitive in the blue
>region. A common light usually does not contain this much blue so using it
>as a backlight will "warm" up the image.
>
>Since you have an all in one you may have other issues in that model may use
>a L.E.D light vs florescent source AND the depth of field may be such that
>the slide will need to be taken out of it's mount , if in one, to be in
>focus. Also the available light level may be "challenged".
>
>..-----Original Message-----
>..From: Ed Herny [mailto:edphemra@pacbell.net]
>..Sent: Wednesday, March 07, 2001 1:14 AM
>..To: alt-photo-process-l@skyway.usask.ca
>..Subject: Scanning Autochromes
>..
>..
>..Hello,
>..I am presently researching an old autochrome of Yosemite National Park
>..as to possible photographer and date. My first challenge is to
>..successfully scan the image. My scanner is not designed for
>..transparencies, so I'm having to improvise (experiment). My scanner is
>..a Hewlett Packard OfficeJetPro 1150C (combination flatbed scanner,
>..copier, printer).
>..I have tried placing a mirror face down on top of the autochrome to try
>..and reflect light back through it, but this did not work. I have also
>..tried placing a small "light box" with a typical translucent white
>..plexiglas surface face down on the autochrome to shine light through
>..it. This produced an image, but it added wide horizontal streaks
>..parallel to the scanning pattern, and the color was badly distorted.
>..Has anybody had any experience in trying to get a standard scanner to
>..scan transparencies by using an outside light source (or any other
>..method)?
>..Any help would be appreciated.
>..Thanks.
>..Ed Herny
>..
>
>
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