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Good morning Richard,

That's what I needed: a kick in the memory cells!  The tape to which I
referred was indeed cellulose acetate.

Best,
Shiffy

On Sun, Apr 11, 2010 at 4:33 AM, Michael Biel <[log in to unmask]> wrote:

> Art Shifrin wrote:
>
>> Years ago I transferred some I.G. Farben paper tape that had been recorded
>> in 1944.  It broke frequently while running @ typical 'modern' tensions.
>>  It
>> was self-evidently more brittle than Brush & 3M paper samples with which
>> I've worked.
>>
>>
>>
> I have received an email back from THE Magnetophon expert, Friedrich Engel,
>  restating to me the answer I already knew:: the Germans did not make paper
> tape.  Here is his answer:
>
> >> Apart from Fritz Pfleumer's experimental tapes on paper base (trade name
> of the paper type was Pergamyn), there was no production of paper tape in
> Germany. Plastics started with cellulose acetate, then came polivinyl
> chloride, then, in the late 1950ies, polyester.
>
> >> 3M as well Japanese producers (and, maybe, a small Austrian company)
> after WW II started with paper tape, all types very short-living.
>
> >> The first tapes on cellulose acetate, coated with carbonyl iron, made
> between about 1933 and 1935, suffered from poor experience with these
> material in the Ludwigshafen plant (... why did'nt they ask the I.G. Faren
> colleagues at Agfa Wolfen works? ...), so these tapes indeed are very
> brittle today. Richard Hess, years ago, asked me about a sample of grey tape
> he found in Jack Mullins collection, which turned out to be carbonyl iron
> tape (visiting Jack Mullin in 1987 he showed me this tape!). R.H. apparently
> was able to play back the tape, but, if I remember correctly, he had some
> problems with breaks and ruptures. <<
>