Digital BW, The Print

On 29/5/03 6:43 pm, "Alex Pettit Jr"
<DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:

> Does this Replacement process decrease the resolution in the final
> image when compared to normal BW silver film ??

Nope. Best think of it as each dye cloud sitting where a 'grain' of silver
halide would have been. Same resolution, less appearance of granularity.

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On 30/5/03 5:00 am, " DigitalLipothymy@..."
<DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:

> that makes sense. i have only had one experience with C41 B+W
> film, and had it developed at a local lab, and when i got it back, i
> was surprised to see that instead of true B+W, it had more of a
> Sepia tone to it. is this normal, or a mess up at the lab?

Depends on which chromagenic film you use - some still have vestiges of the
orange mask familiar from C-41 colour negs. Some are much more like B&W
negs.

Depends on use as some chromagenic B&W films are deigned to be printed to
colour paper for faux B&W prints while other films are designed to be
printed on conventional bromide papers in an enlarger. The former tend to be
me more 'orangey' than the latter. Scanning isn't a problem and printing in
the conventional darkroom means, usually, a harder grade of paper.

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On 30/5/03 5:00 am, "derek_c@..."
<DigitalBlackandWhiteThePrint@yahoogroups.com> wrote:

> So it ought to work on the chromogenic films, i.e. TMax and HP5, as these
> work like colour film and the silver is replaced by dyes during
> processing.

T-Max is a 'new generation' tabular grain silver halide film - it's spectral
response modified by dyes. This is why the wash water is all magenta and why
some people think it is chromagenic. T-Max developer is not C-41 process and
T-Max can be developed (preferably in my opinion) in conventional developers
like D-76/ID-11, X-tol or Ilfosol.

HP5 is a 'classic' silver film and is not chromagenic. As the size of its
final grain is close to the size of dust specks I would think this would be
the least likely film to work with dust removal software in a a scanner.

--
Regards
David Prakel

Centre of Britain PhotoWorkshops Partnership
www.photopartners.co.uk