Re: Ilford Tape & GCHQ
A lot of Ilford tape was made for them by Pyral of France - especially the Zonal brand - and yes it was very good tape as Pyral held the sole mainland Europe Scotch/3M licence. Zonal long held Pyral's UK license but Zonal was put up for sale in 1963 when their founders retired... at which Ilford bought them
Zonal's main business was sound-track film stock. Racal acquired the Ilford-Zonal audio business in 1971. (The Ilford photographic operations went into administration in 2004 .. but survives through an MBO.) Simples!
Barry
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