Re: [APML] TP woes and questions

[Chuck Vaughn <aa6g@aa6g.org>]

Tony,

I think I may have done the ultimate test on this. You may have missed 
it. On my IC5068 which I finished in August this year I used a roll of 
TP I hypered on Oct. 5, 2001. I hypered some more rolls and I took a 
second red exposure with the new film. I could not see any difference 
between the two frames in base fog, sky fog or what was recorded. I 
must admit I was surprised. I have a second roll of that 2 year old 
film that I'll probably use. All this stuff about cosmic rays fogging 
the film isn't true.   If it was true you'd start seeing it 
immediately. One or two month old TP would be degraded and it is not. 
I'm sure there's some limit how long you can store hypered TP in the 
freezer but I don't know what it is.

In regards to Lumicon film.... I bought hypered TP from them on a 
regular basis for 10 years. I never had over hypered film. The opposite 
was the problem. Sometimes it wasn't hypered at all. I tested every 
roll I got from them before I used it in the field. I learned the hard 
way. It was rare to get TP from them that was more than 0.3 above base.

Chuck <aa6g@aa6g.org>

---------------------

> Roland,
>  
>     Let me see if I understood you ... this hypered TP is 2.5 years 
> old??? My guess is that you probably picked up every cosmic ray in the 
> Universe during this time ... the film is probably completely fogged 
> ... and Lumicon has a penchant for hypering on the "heavy" side so the 
> film already had significant hyper fog to start with ... I would 
> definitely develop a small piece to see what you have there.
>  
>        Tony

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