PUSH PROCESSING (B/W)

       These are general guidelines when no published
       development times are available. To use this chart
       multiply the published time at recommended ASA
       by the factor in parenthesis (ie. If Tri-X rated at
       400ASA is normally developed for 6 mins in a
       standard soup, then when Tri-X is pushed three
       stops to 3200ASA development would be: 6 x
       4.5 = 27 mins). Please use these
       recommendations as starting points only. In many
       cases these times will prove excessive, but when
       all else fails they can be a good guideline. Please
       note separate data for Tmax films. 

              Standard Developer 
              1 stop push = (x1.5)
              2 stop push = (x2.25)
              3 stop push = (x4.5)

              Compensating Developer

              1 stop push = (x1.4)
              2 stop push = (x1.85)
              3 stop push = (x2.5)

              TMax Films 
              1 stop push = no change
              2 stop push = (x1.33)
              3 stop push = (x1.66)

       *Compensating developers include Microphen,
       TMax, and any other developers which are
       specifically formulated for push processing