Non-baking cure for sticky shed? (being serious for a moment)

Jon Elson elson at
Mon Jan 18 11:39:16 CST 2016

On 01/18/2016 10:56 AM, js at wrote:
> On 1/18/2016 11:33 AM, Jon Elson wrote:
>> There was a tape sold by a few manufacturers (I think 
>> 3M's was called Black Watch) that had a coarse black 
>> matte finish on the back side.  A problem with some 
>> drives which had fast rewind speeds was that air was 
>> trapped in the tape wind, and then once a bunch more 
>> layers of tape was wound on the reel, the tape wrap would 
>> cinch and fold over a piece of tape.  This matte finish 
>> was supposed to cure that, and I think it did.  But, that 
>> finish was not as durable as the magnetic coating, and 
>> would start to shed all over the drive, leaving stuff on 
>> the data surface.  I think about 5 years after the stuff 
>> came out, most data centers searched out and trashed all 
>> these tapes.
>> Jon
> Interesting.  I just happen to have a 3M Black Watch tape 
> right here next to me that I'm using to test a Mark 300 
> tape cleaning machine.   The tape so far is fine, not 
> shedding anything front or back.
> - J.

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