Mike Teezie said:
I have no idea what the chemical process is for IR film.
And since the film is IR, I'll just need something like a 25a filter, correct?
You don't need an opaque filter, the 25 or 29 red will work fine. You will want to bracket your exposures, your can't really trust your camera meter for it. I would use something around F11 and bracket a stop each direction. The small aperture will help with the focus error should you not have an indicator on your lens or forget to adjust it for the IR light. I would use an ISO of about 200. Take notes at what you set your camera for future reference.
For Kodak HIE which does not have an anti-halation backing, you must load and unload in darkness, a changing bag is huge help. I develop mine with standard T Max developer 30 / 5 second agitation interval and time depending on chemical temperature, you can get times off the Kodak site.
Also, some cameras use an IR sensor to advance film frames, these can fog the edge of the film.
It's hard to find the film in camera stores in Wichita these days so I order it a brick at a time and keep it in the freezer, larger camera stores may have some, it is a specialty item.
I haven't tried it but you can use (HIE) as normal BW film with lots of grain since it is actually more sensitive to blue than IR light.
good hunting,
