Information is pretty sparse for this film. I found a datasheet for “Recordak Micro-File Film Types 5455 & 7455” that seems to be the stuff.
Not knowing how to properly read a film datasheet yet, I searched around and found some info on Type 5069 and started there. If it’s similar, this film was originally rated for ~ ISO 25 (or less — specs for microfilm film are strange). Bracketing my first 24 exposure roll, this stuff is about ISO 6.
I used Kodak HC110 developer dilution ‘B’ at 68F for 6 minutes, agitating the 1st 30 seconds and then 5 seconds every 30 after that. Definitely too much agitation for this film. I got nasty over-development marks at the sprocket holes. Next time I’ll try a much weaker dilution, less agitation, and longer time. I’ve also read that highly dilute Rodinal works well and Photographer’s Formulary makes TD-3 for techpan films. I still have about 97 feet so it will be fun to experiment.
I used Canon Scan Gear for the first two and VueScan for the last one.
Once I learn what I’m doing with this film, I think it will turn out some great exposures.