On Wed, Mar 8, 2023 at 2:16 PM Chuck Guzis via cctalk <cctalk@classiccmp.org>
wrote:

> On 3/8/23 13:53, Sellam Abraham via cctalk wrote:
> > On Wed, Mar 8, 2023 at 1:39 PM Chuck Guzis via cctalk <
> cctalk@classiccmp.org>
> > wrote:
> >
> >> On the subject of 1/2" open-reel tape, I note that the tapes initially
> >> used with the IBM 726 drive (1952) used a cellulose acetate base.  In
> >> 1956, a switch was made to Mylar.   That's unfortunate, since early
> >> existing  726 tapes have almost certainly rotted away due to vinegar
> >> syndrome.
> >>
> >
> > I have what appears to be a stainless steel UNIVAC tape.  It isn't
> > crumbling away into dust anytime soon.
> >
> Heavy bugger,no?
> Nickel-plated Vicalloy (a type of phosphor-bronze).
>

1.76 pounds on the (aluminum?) reel.  That doesn't seem like much, but it's
on a 6" reel, and it definitely feels dense when held.

Phosphor-bronze makes more sense.  Thanks for the clarification.

Sellam

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