The ASA of 32 is for without a filter. The red filter (R25) loses 2 stops, so you will need to rate the film at ASA 8, with the filter. I process this film in D76 undiluted for 6 min. The film has a wonderful characteristic, and is available in 120. But it is very slow, and is not a real IR film. Kodak HIE is the only one that will give you the 'full' IR effect.(posted 9163 days ago)Mike