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Path: utzoo!watmath!watcgl!dmmartindale
From: dmmartindale@watcgl.UUCP (Dave Martindale)
Newsgroups: net.audio
Subject: Re: Print-through on Magnetic Media
Message-ID: <3058@watcgl.UUCP>
Date: Sun, 2-Sep-84 23:13:47 EDT
Article-I.D.: watcgl.3058
Posted: Sun Sep  2 23:13:47 1984
Date-Received: Mon, 3-Sep-84 12:17:05 EDT
References: <177@gitpyr.UUCP>
Organization: U of Waterloo, Ontario
Lines: 15

	Am I missing something or what?  It seems to me that if you consider a
	reel of tape to be magnetic medium separated by air and plastic, then
	it looks something like this:

	  layer N - 1 | air | plastic | layer N | air | plastic | layer N + 1

	Anyway, it seems to me that there is the same distance between layers
	N - 1 and N as between layers N and N + 1.  Why do some of you say that
	one layer is closer to another?  It looks like a pretty close tie to me.
	Shouldn't print-through be the same in both directions?

The layers of tape are equally spaced.  However, the oxide on the tape
isn't necessarily recorded to its full depth.  High frequencies, in
particular, tend not to go very deeply into the oxide.  So print-through
won't necessarily be the same in both directions.