Recent batch characteristic curves

The following chart provides characteristic curve data for recent J Lane Speed Plates Orthochromatic ASA 25 emulsions.  Correct exposure will be found by spot-metering on a gray card in mid-spring at mid-latitudes during mid-morning under northerly lighting conditions.  See the Technicals and Tips Page for more detail on variations due to latitude, time of day, and time of year.  The batch number can be found on the back of each box of plates in PURPLE TEXT

The following chart provides characteristic curve for J Lane Dry Plate ASA 2 Emulsion Batch # 53 and 54.  Correct exposure will be found by spot-metering on a gray card in mid-spring at mid-latitudes during mid-morning under northerly lighting conditions.  See Technicals and Tips Page for more detail on variations due to latitude, time of day, and time of year.  The emulsion batch number can be found on the back of the box in PURPLE TEXT.