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In the world of videotape recovery, non back coated tapes have been found to be sticky just like back coated models. It depends on the stock. 3M 399 is an example of sometimes being sticky. Thus, tape baking usually is the elixir. 


Best Regards,

David Crosthwait
DC Video
Preservation Level Videotape Transfers and More!



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> On Nov 3, 2020, at 6:26 AM, Shai Drori wrote:
> 
> Hi Corey
> Thank you for your advice.
> My inclination was to try baking even though the tapes are not back-coated.
> First test seems very promising.  Two reels tested and played fine. The
> emulsion is different from the green and red reels so I see no pint in
> treating the good reels. I don’t know who manufactured the tape for Nagra
> but it looks to be high quality tape.
> 
> On Mon, 2 Nov 2020 at 21:36 Corey Bailey <[log in to unmask]> wrote:
> 
>> Hi Shai,
>> 
>> I would consider baking the blue reel tapes. Although I save baking as a
>> last resort, layer-to-layer adhesion usually requires careful baking.
>> You may want to lubricate the red & green reels if you have any kind of
>> oxide issues at all, including having to clean the transport more than
>> usual.
>> 
>> Although you are a professional & plenty qualified, you may find some
>> useful information in two articles that I wrote:
>> 
>> 
>> http://www.baileyzone.net/BAKING%20ANALOG%20AND%20DIGITAL%20AUDIO%20TAPE.htm
>> 
>> http://www.baileyzone.net/LUBRICATING%20POLYESTER%20AUDIO%20TAPE.htm
>> 
>> Be safe,
>> 
>> ~CB
>> 
>> Corey Bailey Audio Engineering
>> www.baileyzone.net
>> 
>> On 11/2/2020 4:17 AM, Shai Drori wrote:
>>> Hoping to find some answers from the group about a problem I am facing.
>> I'm
>>> digitizing a few hundred Nagra SN tapes. These are reel to reel tapes in
>>> the width of a cassette. There are three lengths, red, green, and blue
>>> reels, with blue being the thinnest and longest tape
>>> 
>>> the red and green tapes play fine but the blue tapes are stuck so each
>>> layer is glued to the layer before it. When I try to play the tapes they
>>> squeal and the magnetic particles sometimes are removed from the base and
>>> stay stuck to the back of the layer before. These tapes are not
>>> black-coated and resemble really thin c-120 cassette material.
>>> 
>>> Any suggestions are welcome.
>>> 
>>> Cheers
>>> Shai 
>> 
> -- 
>