I would be VERY careful about baking the blue reels. That tape is
extremely thin, and may warp in the process, depending on tension of the
pack. Also, if you are using an SN machine to play the tapes back, the
rather low tape tension may aggravate dropouts (although the thinner
I would definitely try vacuum extraction before baking.
Strange, I have done quite a number of SN tape transfers over the years,
and have never run into an issue with binder hydrolysis or shedding.
Could have been a bad batch I suppose.
Scott D. Smith CAS
Chicago Audio Works, Inc.
On 11/2/2020 6:17 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.
> Shai Drori
> Expert digitization services for Audio Video
> 3K scanning for film 8mm-35mm
> Timeless Recordings Music Label
> [log in to unmask]