Hi, John,

This is indeed true. HOWEVER, my success rate for baking tapes that are 
suffering from squealing and/or deposition that are not back coated is 
much lower.

This raises another question. If all binder breakdown is hydrolysis, 
then why doesn't baking cure it 100%? I'm thinking of Sony PR-150 and 
3M-175.

These two seem to show the falling Tg, but don't have the shedding. They 
are outliers and inconsistent.

Cheers,

Richard



On 1/24/2016 3:41 PM, John Schroth wrote:
> Back-coating may instigate or speed up the hydrolysis process but I
> cannot ignore the fact that there are still obscure instances where the
> tape had no back-coating and suffered from SS. Richard, you have noted
> this in the past and I have had this happen in at least two instances
> that I can recall. I'm at home today so I don't have access to my notes,
> but it was clearly sticky shed on tapes that had no back-coating. So one
> should not "always" equate back-coating with sticky shed.
>
> Just my two cents...
>
> John Schroth
> MTS
>

-- 
Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada                             647 479 2800
http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.