development time formulagreenspun.com : LUSENET : B&W Photo - Film & Processing : One Thread |
I remember a formula for development times in an old publication but I can't remember the name of the book. Several of the film types were assigned a guide number and the the unknowns were temperature and developer. Where can I obtain this formula?
-- Dan Johnson (goddoot01@bellsouth.net), February 25, 1999