Ian Grant
Subscriber
For what it's worth. I checked my 1954 Kodak films book .No mention of Royal Pan X. Royal Pan was available only in sheets. Description , high speed, moderate contrast, low graininess, Exposure Index Daylight 200, Tungsten 160 .
There's no mention in my earlier 1950's Kodak Ltd Catalogues or BJP Almanacs of Royal Pan however I'd assume Panchro Royal was very similar, it the same ASA/BS speeds. There may have been some slight variation between the two but they weren't sold in the same markets. When Tri-X was re-introduced there were variations and some of the more professional Kodak developers listed different development times for films coated in the US, Canada, or UK.
Tri-X had been introduced just before WWII as a sheet film and was coated by Kodak Ltd in the UK as well as their new factory in Hungary (later to become Forte) it went out of production probably because a key component was no longer available during the war. It's odd that Kodak had no fast B&W film competing with HP2/3 until the introduction of Panchro Royal sheet film in 1953/4 and Tri-X roll films late 1954.
Ian
