Re: [ARSCLIST] Ampex 456

["Richard L. Hess" <arclists@xxxxxxxxxxxxxxx>]

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.