Mac Legrandi (juicebox@my-deja.com)
Fri, 28 May 1999 18:55:29 -0700
Hi Sil!
Have you built a positive pressure frame? Could you describe how you'd use the pump and what you are inflating? I'm in need of such a thing. My frame is completely useless for 16x20 contacts. To many softspots where contact is not tight.
Any info will be appreciated!
Thanks!!
Mac
>From: Sil Horwitz [mailto:silh@iag.net]
>Alternatively (and to me, more
>desireable) is to use the air output to force a positive pressure to press a
>flexible backing against the glass-neg-paper "sandwich" as it is easier to
>get even pressure positively than through a vacuum, which requires an air
>input evenly over the surface, a precision requirement. With pressure,
>precision is not all that critical. And an aquarium pump (diaphragm or
>piston) will do the job.
>
>Have fun. The fun IS experimenting!
>
>
>Sil Horwitz, FPSA
>Technical Editor, PSA Journal
>silh@iag.net
>Visit http://www.psa-photo.org/
>Personal page: http://www.iag.net/~silh/
>
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This archive was generated by hypermail 2.0b3 on Thu Oct 28 1999 - 21:39:35