[rollei_list] Re: OT: Bad Fuji RVP 50 development
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Sat, 6 Sep 2008 12:02:55 -0700
----- Original Message -----
From: "John Wild" <JWild@xxxxxxxxxxxxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Saturday, September 06, 2008 3:41 AM
Subject: [rollei_list] Re: OT: Bad Fuji RVP 50 development
Jose,
It should be possible to get acceptable prints from these
'negatives'. A
conventional colour negative has an orange/red mask. Your
film will not,
but the colours will still be reversed. If these images are
scanned into
a computer, they could be reasonably easily manipulated and
corrected in
Photoshop or a similar program by inverting the image and
then
correcting any colour cast that may be present.
For reference, I researched a method of scanning whole
strips of 120
colour negative film and then printing them out as an A4
size contact
sheet. It was necessary to remove this colour mask
effectively and then
inverting the image. I will send you a copy off list. There
are numerous
references to removing a C41 colour cast on the internet.
This is not
your case but the overall colour cast removal will be a
similar process.
Also you could go to
http://www.scanhancer.com/index.php?art=17&men=17
and download the Scanhancer manual. This recommends scanning
negatives
as a transparency** and then tells you how to invert the
image and
correct the colour cast. Your situation is reversed but the
same basic
principles should apply.
**This is to do with maximum highlight and shadow detail
in the
resulting scanned image.
It is fun experimenting and making corrections so, good
luck!
John
I agree that acceptable prints are possible from these
"negatives" but more is required than simply reversing the
colors and densities. The orange cast is not just a tint but
a color correction mask in two of the color layers. The mask
is generated by using couplers which are themselves colored.
The couplers are the compounds which produce the dyes in
reaction to the developer. Where the coupler is converted to
dye the mask is destroyed to the same degree as the amount
of coupler converted resulting in a positive mask in the
right color to compensate for the spurious transmission of
color by the dye. The main effect is to improve color purity
and saturation. If you look closely at the image on a color
negative you will find that in areas with dense dye there is
no orange tint. Since the cross-processed transparency has
no color masking the reproduction of color may be improved
by using the computer program to generate some correction. I
don't know if there is a plug-in for Photoshop to do this.
When a true color negative is scanned the masking is
automatic because it is built into the image and will be
effective whether the negative is scanned as a transparency
or a negative.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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