Wirelessly posted (BlackBerry9000/4.6.0.167 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102 UP.Link/6.3.0.0.0)

My old dtat guide has a time/temp chart that indicates 6.5-7 minutes at 68F. Does not specify any particular film but it's a starting point.