I just remembered a kodak publication that I read years ago that stated their batch to batch film speed variation was kept to + or - 1/10th of a stop. A batch of Plus-X that tested as ISO 110 would fail quality control under this standard.
I just remembered a kodak publication that I read years ago that stated their batch to batch film speed variation was kept to + or - 1/10th of a stop. A batch of Plus-X that tested as ISO 110 would fail quality control under this standard.