Re: [ARSCLIST] Ampex 456

[Tom Fine <tflists@xxxxxxxxxxxxxxxxxxx>]

I'm not so sure about this. Ask Steve Puntollilo, who has successfully baked and transferred many 
sticky 2" tapes. As I understand it, 12 hours at the right temp will do it for any tape.


----- Original Message ----- 
From: "Steven Smolian" <smolians@xxxxxxxxx>
To: <ARSCLIST@xxxxxxxxxxxxxxxx>
Sent: Friday, June 16, 2006 7:26 PM
Subject: Re: [ARSCLIST] Ampex 456


> It depends on the width and thickness of the tape.
>
> Steve Smolian
>
>
> ----- Original Message ----- 
> From: "Tom Fine" <tflists@xxxxxxxxxxxxxxxxxxx>
> To: <ARSCLIST@xxxxxxxxxxxx>
> Sent: Friday, June 16, 2006 5:05 PM
> Subject: Re: [ARSCLIST] Ampex 456
>
>
> > Bill Lund, formerly of 3M, and a tape chemistry expert, suggests 12 hours bake, 12 hours cool to 
> > room temp before playing. I trust Bill and have used that method successfully numerous times. 
> > Earlier experiments with shorter times were not residue free but did result in playability.
> >
> > No offense to the LOC, but Bill actually worked at 3M and was involved with figuring out what was 
> > wrong with Scotch 226.
> >
> > -- Tom Fine
> >
> > ----- Original Message ----- 
> > From: "Robert Hodge" <rjhodge@xxxxxxx>
> > To: <ARSCLIST@xxxxxxxxxxxxxxxx>
> > Sent: Friday, June 16, 2006 10:09 AM
> > Subject: Re: [ARSCLIST] Ampex 456
> >
> >
> > > Hi,
> > >
> > > I suspect that due to the increased surface area of your tape, you
> > > would have to increase the baking time normally used for 1/4 inch tape.
> > >
> > > Library Of Congress recommends 8 hours at 130 degrees for pre 1975 and
> > > 5 hours at 130 degrees for post 1975 and later for 1/4 inch tape.
> > > I've never baked 2 inch , but this is the path I'd follow unless
> > > someone has done it differently with success.
> > > 64 hours at 130 pre 1975 and 40 hours 130 for 1975 and later.
> > > ( Seems like a lot. ) But the math indicates it so. And the same
> > > amount of time for cooldown which is equally important..
> > >
> > > Best of luck  !
> > >
> > > Bob Hodge
> > >
> > > Robert Hodge,
> > > Senior Engineer
> > > Belfer Audio Archive
> > > Syracuse University
> > > 222 Waverly Ave .
> > > Syracuse N.Y. 13244-2010
> > >
> > > 315-443- 7971
> > > FAX-315-443-4866
> > >
> > > > > > arclists@xxxxxxxxxxxxxxx 6/16/2006 8:42 AM >>>
> > > At 06:51 AM 6/16/2006, Lars Gaustad wrote:
> > > > Hi,
> > > > I have got a 2" Apmex 456 that is really sticky.
> > > > I has been stored at 8 C 35% RH for 8 years,
> > > > which makes me believe that the stickyness is not related to
> > > hydrolysis
> > > > (SS),
> > > > as such storage should rejuvenate the tape just as well as baking
> > > will.
> > > > Any suggestions?
> > >
> > > Baking should still rejuvenate it if past history is any guide. I'm
> > > looking for a good explanation of precisely why baking works, but
> > > I've been told by people who understand these things that the
> > > generally accepted explanation is not the whole story.
> > >
> > > There does appear to be mounting evidence that there is interaction
> > > between the back coat and the oxide binder system. Again, no answers
> > > at this time.
> > >
> > > I'm not being mysterious, I'm slowly studying this.
> > >
> > > Thanks for a really useful data point.
> > >
> > > Many of the people working on this are not on this list and I'm
> > > taking the liberty of passing on your observations to them.
> > >
> > > Cheers,
> > >
> > > Richard
> > >
> > >
> > > > lars gaustad
> > > > preservation adviser
> > > > national library of norway
> > > > www.nb.no
> > >
> > > Richard L. Hess                   email: richard@xxxxxxxxxxxxxxx
> > > Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
> > > Detailed contact information:
> > > http://www.richardhess.com/tape/contact.htm
> > > Quality tape transfers -- even from hard-to-play tapes.
> >
> >
> > --
> > No virus found in this incoming message.
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