The premise of this test was three films, shot under the same conditions. All three were shot in the same camera, same day. I metered for an arbitrary iso of 8 and bracketed (sometimes) one or two stops over, as you can't really meter for IR. All three rolls were then stand processed in Rodinal (1+100 for 1 hr). The SFX yielded 12 rather flat but printable negatives. I'll take what I learned here and try again metering the films individually.