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RE: filmscanners: RE: filmscanners: RE: filmscanners: Pixels per inch vs DPI



> Austin Franklin wrote:
>
>   >>Very simply, grain, or dye clouds are predetermined in their location
>   >>and shape and are not relocated by picture content.
>   >>
>   >
>   > What about development?
>   >
>
> Also, some developing techniques can somewhat alter the shape or size of
> the dye clouds...

Somewhat?

> However, most of this type of thing is done in custom film development
> of black and white film,

You can alter the grain of B&W film by at least two to four times simply by
developer choice, dilution, temperature and technique.  It certainly isn't
"custom", most anyone who uses B&W has their favorite
developer/dilution/temperature and technique that suits their
needs/style/experimentation.  It is VERY critical when talking about film
grain to discuss development AND even exposure (as you mentioned push/pull
too)...since the same film can give such drastically different results...and
more so even if you are using Zone system compensation development.

> because the need to control so many other
> variables within color film development doesn't allow for much playing
> around. Most color film processing is fairly uniform in its method...

Not quite true...see below...

> This is why almost all
> color film is souped in one of two basic color chemistry types (C-41 or
> E-6).

There are different E-6 and C-41 processes.  Different chemical AND entirely
different developments, as well as techniques.  E6 can be 3 bath or 6 bath,
and C-41 can be 2 bath or 3 bath.  All of this plays a SIGNIFICANT role on
the shape and size of the dye clouds.

It can be far more significant than you made it out to be.

> However, I know of no color development technique that is capable of
> moving film grain or dye clouds within the emulsion so that they can
> line up the grain as a result of the image content. If you do, I'd like
> to here about it.

I don't believe anyone ever suggested that at all...




 




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