Print

Print


"only unopened/sealed tapes are useful". Not many of us could easily meet
that requirement. I could supply 3M 250 and 808 in intact form but not
unopened. I'll wait to hear what your search yields.

DDR

On Fri, Jun 29, 2012 at 3:17 PM, Eric Breitung <[log in to unmask]> wrote:

> I'm a scientist at the Library of Congress working on a pre-play (minimally
> invasive) identification method for sticky/degraded magnetic tape.  I have
> a
> few of the very common quarter-inch tapes Ampex 406, 456, Scotch 201, 207,
> and 808, but to validate the method, I'm hoping to find in-kind offerings
> of
> any of the following (or others you know of that are known to degrade):
>
> (1/4")
> Agfa PEM-468, 469, 526
> Ampex 373, 406, 407, 456, 457, 499, 2020
> Audiotape/Capitol Q15
> EMTEC SM911
> Melody 169
> Scotch/3M Classic, Master-XS, 175, 201, 250, 806-9,
>       908, 966, 967, Pro-206, 207, 226, 227, 808, 986
> Sony - PR-150, FeCr, SLH, ULH-72-370-BL
> TDK 150H
>
>
> Because of the ease of confusion of boxes, hubs, reels, tapes after
> opening,
> only unopened/sealed tapes are useful.
> If you're interested in helping but want the tapes returned to you, I can
> do
> that as well.  Otherwise, we will keep them as part of our test collection.
>
> The method: Uses IR spectroscopy and multi-variate statistical analysis to
> differentiate degraded and non-degraded magnetic tapes: see "Report on
> Research and Testing of Audiovisual Media at the Library of Congress" from
> 2012 ARSC and IRUG Conference 2012, Barcelona).  Using the Library's
> collection - testing 100 tapes from the 1970-1990's, we've been able to
> accurately identify 98% of the time which polyester-urethane tapes are
> degraded or not using IR spectroscopy.
>
> Please don't hesitate to contact me.  The LC should be able to pay for
> shipping...
>
> Thank you kindly -
> Eric Breitung
> Chemist
> Library of Congress
> Preservation Research and Testing Division
> ebre at loc dot gov
>



-- 
Dennis D. Rooney
303 W. 66th Street, 9HE
New York, NY 10023
212.874.9626