My understanding about print thru has been that the actual recording
that was made while being high frequency biased was more permanent than
contact recording -- which is what print thru is.  Flexation of the tape
around the guides can slightly erase this contact recording.  Another
factor is that print thru generally goes from the center of the reel
outwards  -- really through the plastic base to the bare oxide touching
the base.  If you store the tape heads out you will more likely get a
pre-echo from the print thru.  Tails out storage gives you a post-echo
which is more natural and less noticeable.  

I remember when Showtime premiered the film of My Fair Lady, which they
took off an original print with magnetic sound.  In years of storage it
had loads of print thru, both pre and post.  Of course some of it could
be a few seconds away from the original sound if it was on the outer
edge of a reel, but I have a feeling that "I've Grown Accustomed To Her
Face" had been on a core at the start of a reel.  Where Higgens is
walking and then stops and shouts DAMN! we heard at least five pre and
five post DAMNS! starting at low volume and getting louder and then
softer.  Somewhere I have the tape I made of this.

AC magnetic fields in storage can increase print thru.  I once got some
VHS tapes someone had tried to bulk erase with a weak hand-held bulker. 
The picture was still there where the control track still existed, but
boy was there a hell of a lot of audio print thru on the edge track!!!  
 


-------- Original Message --------
Subject: Re: [ARSCLIST] Tape tails out
From: Steven Smolian <[log in to unmask]>
Date: Thu, March 12, 2015 12:45 pm
To: [log in to unmask]

I, too, recall but can't find the article, though it may have been one
of
those 3M published bulletins as well.

I believe Del identified two kinds of print-through, one ccaused by too
much
level and consequent leaf-to-leaf transfer of too much magnetism- I
don't
know the techincal tern for that. The other was a storage phenomenon of
slowly generated (or whatever THAT term is) movement of alterady
recorded
program that was discharged during rewind. In the former case, I believe
it
was considered "baked in." 

Steve Smolian

-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]] On Behalf Of Doug Pomeroy
Sent: Thursday, March 12, 2015 10:17 AM
To: [log in to unmask]
Subject: Re: [ARSCLIST] Tape tails out

Somewhere have a copy of the article published years ago in one of the
audio
magazines about a study done by 3M of the reduction in print-thru
achieved
by fast winding of tape before playing. Presumably the rapid passage of
the
tape over the metal tape lifters is responsible for this.

Doug Pomeroy
Audio Restoration and Mastering Services
193 Baltic St 
Brooklyn, NY 11201-6173
(718) 855-2650(718) 855-2650
[log in to unmask]

On Mar 12, 2015, at 12:00 AM, ARSCLIST automatic digest system wrote:

> Date: Wed, 11 Mar 2015 06:39:43 -0400
> From: Tom Fine <[log in to unmask]>
> Subject: Re: Tape tails out
> 
> I'm not saying it's impossible that FFRR records were cut backwards, 
> but I highly doubt it. I will check with my Decca-expert friends at UMG
and report back if I uncover any facts.
> 
> As far as tails out, doesn't "rewinding" the tape (which no one should 
> do with a fragile old tape -- play it back at normal speed or use a 
> very gentle library-wind mode -- provide the benefit of reducing some 
> print-through? We've discussed this on the Ampex list before, therre's 
> some research-proven benefit of fast-winding tape before playback, to 
> reduce print-through. Jay McKnight explained it in detail, it gets 
> into physics beyond my pay grade. I apparently did not receive the
education some on this list have mentioned, because the whole concept of
electromagnetism remains somewhat vague to me.
> 
> -- Tom Fine

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