I thought that Konica was just as sensitive to the visible spectrum as the Maco 820 and Ilford SFX films.
I have found that the Maco 820 film works best with either the 88A or 87 filters; anything less and you won't see the IR effect. Ilford SFX gives a good IR effect with an 89B/R72 filter.
I've never heard of an anti-curl layer on the Maco films. I know there's an anti-halation layer on the 820c Precision film. How warm was your water?
Originally Posted by AllanD