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I posted a message with as much information as I have available earlier 
today.

> There is some information available for this. As far as treating 
> obstinate tapes, I am trying to maintain an up-to-date resource on the 
> subject.
>
> The best international standard so far that I've seen is IASA TC-04 
> and it's available online.
> IASA's TC04 on audio preservation is available online (and for a fee 
> in a print edition)
> http://www.iasa-web.org/tc04/audio-preservation
>
> I introduced th concept of cold playback (and hopefully explained it 
> well) as well as attempted to cover the then state of the art in tape 
> degradation in my paper on tape degradation that was originally 
> presented at the Audio Engineering Society's 121st convention in 
> October 2006 in San Francisco was published in the ARSC Journal in the 
> Fall of 2008. It is available here:
> http://www.richardhess.com/tape/history/HESS_Tape_Degradation_ARSC_Journal_39-2.pdf 
>
>
> I attempt to keep a current (as we know it here on this and other 
> lists) log of what tapes degrade in what manner and how to recover them.
> http://richardhess.com/notes/formats/magnetic-media/magnetic-tapes/analog-audio/degrading-tapes/ 
>
>
> There may be specific applications to various scenarios, try the 
> search box. I think there are now over 100 pages there--both static 
> and in the blog.
>
> For squealing Shamrock, I have a specific article on another method of 
> recovery:
> http://richardhess.com/notes/2007/11/08/success-with-squealing-shamrock-031-tape/ 
>
>
> Finally, there is a blog category tag that you might wish to browse. 
> The categories are listed below the static pages in the right sidebar.
> http://richardhess.com/notes/category/archive-operations/tape-aging/ 

On 2012-08-14 7:07 PM, Jan Myren wrote:
> HI!
>
> Have by now started to play old tapes and found that the older the better. The tapes form the 60's & 70's of Agfa, Basf, Scotch etc plays just very fine.
> Some tapes from the 80's & 90's are however very troublesome, or just impossible to play. Among them are Ampex and Agfa. The tape itself acts like a "glue" and makes the whole tapemachine stop.
>
> Are there any list of such trouble tapes, so I can avoid those brands and types when purchasing tapes second hand?
>
> All the best
> jan
>

-- 
Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada           (905) 713 6733     1-877-TAPE-FIX
http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.