I think by using a green filter you may have confounded the spectrum that HIE responds to (unless that was your intent, of course). Might wish to give a #25 a try. Better hurry - Kodak is discontinuing HIE.
You have sure right. Happily I have some more HIE's in my freezer. Maybe I by some more before they are discontinued - I didn't know they planned that. Thanks for the info!
Hmmm....I wasn't thinking....is the most possible answer! Maybe another answer is that I only some days before setting this film in my camera was on B+W filter-sale at Oslo Camera Service's shop. There I bought this B+W 0-61 filter besides a B+W 0-91 red filter and a B+W 0-92 Infrared filter - and a B+W Closeup lens - all with 50% rebate. And I had to try the filters I have bought...