Have also looked at AGFA film vs. ALI-7 and agree with other 
     respondents regarding edge acuity.
     In regard to stability, no film manufacturer to my knowledge has 
     developed a polyester base that has superior stability compared to 
     their competitors. Kodak had reduced the amount of gelatin in the 
     emulsion formula but the I'm not sure we saw a marked improvement in 
     stability. The best way to ensure stability is to carefully control 
     the film storage, (raw and imaged), image generation and image 
     transfer areas to each other. Film manufacturers cite 70 degrees F and 
     50% Rh as optimum. If you're running at 74 degrees and 45% there 
     should be no problem as long as you acclimate the raw film to those 
     conditions AND your other imaging and storage areas are also running 
     at or about those conditions.
     Scratch resistance is a nice feature. The ALI-7 and Agfa products both 
     exhibit this characteristic. "Scratch resistance" is the key. Don't 
     confuse it with "scratchproof". No conventional silver halide film is. 
     To reduce scratch related defects nothing can beat "good housekeeping" 
     and proper handling practices.
     Hope this information helps.
     
     KJ


______________________________ Reply Separator _________________________________
Subject: Re: Plotting Films
Author:  JMONAGHAN at hadcoderry
Date:    6/3/96 09:53 AM


At 06:11 PM 6/2/96 -0700, you wrote:
>Any opinions concerning Plotting and darkroom films for pcb 
>manufacturing?
>Which do you prefer
>Any comparisons between Kodak and Agfa? 
>Line edge , Stability , Scratch resistance 
>opinions greatfully accepted.
>Thanks
> John Gibson J.A.G. Imaging Systems 
> [log in to unmask]
>
>
We evaluated darkroom films about 8 months ago and the line edge acuity 
(fringing) of the Kodak films was superior to the other films. 
     
Lyle Anderson
Electrostar-Utah
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