Hi Just purchased 5 rolls of each to use for a little of this and that (some IR, some not). Currently I have Rodinal dev and a bottle of Tetenal Ultrafin. Beacuse the shelf-life of the Tetenal is shorter (and that I am currently experimenting with films and devs), and my later plans are to use these films for IR, I am looking to develop these films in Tetenal Ultrafin. - My experience so far, is that Ultrafin makes quite a difference in the grain department, compared to caffenol and Rodinal. (though caffenol-c-l and tetenal ultrafin are similar in grain with ie. Polypan-F). Problem:The massive dev chart doesn't have much information regarding these films and Tetenal Ultrafin. Internet search was also more or less fruitless (only found a similar thread in Polish, which stated 1:10 for 9 minutes came out "good"). Anyone with experience and/or tips on how to approach this? (I'd rather not bungle roll after roll of 120 film due to the expense).