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From: wunder@wdl1.UUCP
Newsgroups: net.rec.photo
Subject: Re: Strange processing...
Message-ID: <404@wdl1.UUCP>
Date: Fri, 10-May-85 01:24:15 EDT
Article-I.D.: wdl1.404
Posted: Fri May 10 01:24:15 1985
Date-Received: Mon, 13-May-85 00:47:14 EDT
Sender: notes@wdl1.UUCP
Organization: Ford Aerospace, Western Development Laboratories
Lines: 7
Nf-ID: #R:acf4:-272002800:wdl1:7300004:000:226
Nf-From: wdl1!wunder    May  9 20:51:00 1985

If you bend a negative sharply enough, the acetate gets a stress
mark of some sort.  This makes a light mark on the print.  Normally,
though, the mark is sort of crescent-shaped, at least in my clumsy
hand-processing.

wunder