[tig] over exposed 35mm
john.pytlak at kodak.com
Fri Jun 25 13:08:59 BST 2004
In a tungsten balance color negative film, the blue sensitive layer
requires the most speed, and so usually has the largest grains. Silver
halide grain size ranges from sub-micron (less than 1 micrometer) to only
about 5 micrometers for the largest grains in the fast component ("toe"
portion of the sensitometric curve) of the fastest films.
Color negative camera films are usually formulated with "fast", "mid", and
"slow" components to the emulsion, making up the "toe", "straight line"
and "shoulder" parts of the characteristic curve. Underexposure results
in grainier images because the "fast" component has the largest grains.
The new Kodak VISION2 films incorporate greatly improved emulsion
technology, allowing sharper, finer-grained images.
John P. Pytlak
Senior Technical Specialist
Customer Technical Services
Research Labs, Building 69, Room 7525A
Eastman Kodak Company
Rochester, New York 14650-1922 USA
Telephone: +1 585 477 5325
Cell: +1 585 781 4036
Fax: +1 585 722 7243
e-mail: john.pytlak at kodak.com
On 2004-06-24 at 05:33, Peter Swinson (peter_swinson at compuserve.com)
> I have sent Rob a separate micro-image of film grain for placement on
> TIG, when it gets poted note the large blue floaters in the D min area,
> much less obvious in the higher density areas.
for a compilation of this thread and at the end Peter's scans.
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