[Milsurplus] [die at dieconsulting.com: Re: WWII Facsmile]

[J. Forster]

Yes. It was also used for electric field plotting experiments in the MIT
EE Department, because it was cheap and had uniform sheet resistivity.

-John

================


> The paper that was marked by burning off the coating was Teledeltos,
> invented at Western Union and made for them by their suppliers.  At one
> time the process was secret, so they had several different suppliers
> doing different parts of the production.
>
> There are several articles about Teledeltos in the Western Union Technical
> Review, which is online at massis.lcs.mit.edu   google for it.
>
> Wet chemical papers were made by Alden and Hogan.  Alden's was sepia
> colored, and Hogan's was called catechol and was gray colored.  The two
> companies argued a lot about which was better, but to the end user
> both of them were fairly lousy.
>
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