Re: Demise of HSI

[Clive Warren <Clive.Warren@xxxxxxxxxxxxx>]

At 3:51 pm -0700 21/3/00, Christina Z. Anderson wrote:

>Am I wrong in assuming that the spots on the infrared film is due to acid
>from one's fingers eating away at the emulsion?  That's what someone told me
>and I just accepted it as gospel.  I suppose, therefore, it would only be
>around the edges where the film was handled...
>
> The > film produced interesting images, but was loaded with blemishes I
>could not
>> eliminate. Over the years, I retested the film and consulted with tech.
>> reps., but I could never get clean film.
>>
>> I really feel Kodak has let me down. First by stonewalling (me and)
>> everyone, denying there was a manufacturing problem with the film. This
>led
>> to countless hours of wasted time and materials trying to eliminate flaws
>> that were built into the film. And second, by discontinuing a film that is
>> virtually unique in the marketplace.
>> Stanley K. Patz


Christina,

There have been lengthy discussions on the list about pinholes in HSI 4x5
film. These can be read in the archives if you are interested.

The facts can be found in the Infrared FAQ on the CoCam website at the
following URL:

			http://www.cocam.co.uk

There is also a link in the FAQ to the Infrared Mailing List archives
hosted by Marco Pauck.

Natural acids on fingers is not reason for pinholes - the real reason is
associated with the manufacturing process. Inappropriate development
techniques can also cause problems.




All the best,

             Clive   http://www.cocam.co.uk
                     Photographic Services, Filters and Equipment, Infrared FAQ
                            http://clive.bel-epa.com
                            Adventures in Cyberspace - Digital Art and Photos


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