Hi Bob,

Thanks for all the help Bob.  I appreciate all the suggestions you've
already given. By the way, do you know any text or document that can help
me study photo tool behavior better?  I've been working on photo tools for
almost 2 years but mostly without proper training.  It's really hard to
solve problems when you don't know the basics.

Thanks again!

Marco

----------
> From: Bob Seyfert <[log in to unmask]>
> To: TechNet E-Mail Forum. <[log in to unmask]>; Marco Biagtan
<[log in to unmask]>
> Subject: Re: [TN] Film Stabilization
> Date: Friday, August 07, 1998 5:27 AM
>
> Hi Marco,
>
> It does not matter what temperature or RH you choose for your plotter
room,
> conditioning room, yellow room, etc -- provided that the conditions are
the
> same in all areas where the film is handled and used; and the conditions
in
> these rooms are not changing.  Pick conditions that are easy to control
to
> and comfortable to work in.  The film does need to be pre-conditioned and
> plotted at the same temperature and RH as the yellow room where it will
be
> used.  Complete pre-conditioning requires 6-8 hours if you use a cabinet
> designed to allow air to come into contact with both sides of the film
> (open wire shelves - one sheet per shelf).  It will take considerably
> longer under other conditions.  After post-processing conditioning
requires
> 1-2 hours on open shelves.
>
> Regards,
>
> Bob Seyfert
> Technical Manager - Phototools
> DuPont Electronics
>
>
>
>
>
>
> At 03:15 PM 8/6/98 -0400, you wrote:
> >Hi everyone!
> >
> >I'm currently involved in the production of artwork for pcb
manufacturing
> >and one major problem that we have is film stability.  To my knowledge,
raw
> >films have to be pre-stabilized before use and again stabilized after
> >processing at constant RH and temp (usually 55% and 23C) for 2 to 4
hours.
> >If RH or temp increases, the dimension increase and vice versa.  But
what
> >if raw films are pre-stabilized at a lower RH (say 45%) and after
> >processing these are stabilized also at the same RH.  Will the film
still
> >experience shrinkage even if it was stabilized at constant RH? (Same
> >question also for Temp)
> >
> >If anyone can help me with this one, I'd appreciate it.  Thanks!
> >
> >Marco Biagtan
> >Artwork Process
> >NEC Components Philippines Inc.
> >[log in to unmask]
> >
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