It’s a great film. Very versatile. I’ve gotten more than twelves zones out of it with variations in processing. You have to invent your own processing times and processing procedures for this film because it was not sold to the public and the only processing information is for versomat machines, which are for processing long lengths of 5″ or 12″ wide film. Those are the only two formats it was made in. It’s an aerial reconnaissance film, and it was never made in any consumer sizes (i.e. 35mm, 120, etc.), although I have gotten it in those formats as a result of cutting down for special orders. It was meant for the military, and the way they packaged it has led to it aging quite well. I have cut it down into 120 and sheet film sizes for various formats and if you have the patience for that sort of thing, it’s worth it.
Please note – I do not own the rights to these documents. If you are the rights holder and you want me to take them down, please contact me and I will do so without objection. My aim here is only to make available for public use information which is otherwise unavailable or hard to find. I do not seek to profit from this in any way whatsoever. This information is quite old and hard to find, so I’m only trying to help others out.