I have some BPFB-18 that I would like to use to make enlarged negs for Pt printing. The instruction sheet accompanying the film, in regard to exposure and processing is vague to say the least and I could find little data with a web search. Could someone that has used this film successfully please give me a general idea as to exposure for a projected average contrast interpositive (seconds? minutes? similar to paper?). I assume the speed of this film is 18, any reciprocity concerns? The developers I have on hand are HC110, XTOL, Rodinal, A49, T-max, D76 & Dektol, will one of these suffice? Also any suggestions for development times. Thanks....Annie.