I'll probably find out. Last year I bought a grafmatic holder off LFPF and the seller threw in a mostly full box of 4x5 Efke 100. I plopped it in the freezer but haven't tried any of it. I recently bought a 50 sheet box of 4x5 Efke IR820 too when this news hit, so I'll see about that. It's probably staying frozen until spring. There's not a lot of good IR shooting in the winter in my area with vegetation dead and many days gloomy.
Originally Posted by Photo Engineer