From: Jack Fulton (jefulton1@attbi.com)
Date: 04/07/03-09:40:03 PM Z
Just off the top of my head, and based upon experience with Ado ISO 12 film
of many years ago . . though you rated the film @ whatever ISO was
indicated, did you BRACKET? That's the key to find the correct speed. Then,
once speed is derived you can judge development time by observing the
contrast.
Jack
>
> Having just bought some Arista Pro 125 (aka, Ilford FP4+) I decided to run
> some film speed tests. I tried Crawley's FX-37 developer, Kodak Xtol, and
> D-76/ID 11 and ran into what I consider a problem. All of the developers
> indicated an EI of about 12-25 with standard development using a B+W
> densitometer. Increasing dilution and development effected the highlights
> but not the shadows; the EI still remained 12-25. The reason for testing
> Crawley's FX-37 developer and Kodak Xtol was that they are listed as
> increasing speed and sharpness with greater dilutions. I also tried Sandy's
> Pyrocat-HD developer and found that the film did not record anything below
> zone IV. All chemistry was mixed from raw chemicals just prior to
> development. I thought it might be possible that my 35mm camera's meter was
> off so I took readings with a spot meter and got the same readings.
>
> Has anyone encountered this problem before? Could my chemicals have gone bad
> in less than six months? Any ideas on how I can get the film speed closer
> the manufacturer's rating of 125?
>
> Thanks in advance,
>
> Scott
> smwbmp@starpower.net
>
>
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