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Figure  2-18.Record  Form  Y-55
Action to Take When Control Limits are Exceeded

Photography (Advanced) - Advanced manual for photography and other graphic techniques
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Whenever a problem is suspected. As soon as a control strip comes out of the dryer, identify it with the time and date of processing (not the  time  it  was  actually  read).  A  code  number identifying a machine or operator is also helpful when your facility has more than one of the same type of processor. Always inspect a control strip for physical or chemical  defects  before  reading  the  appropriate densities. Use the middle area of the density steps for taking  the  density  readings.  Make  each  measurement twice. You should use a slightly different area of the step each time, and average the readings. The   emphasis   in   process   monitoring   is   on densitometry. Keep in mind, however, that changes in the process are made by chemical and mechanical variations, intentional or not. Problems are much easier to track when records are kept of all intentional changes in the following: Machine speed Solution temperatures Replenishment  rates Agitation Filters Squeegee  adjustments Parts (racks, gears, pumps, and lines) Operators Processing solutions Types of film Figure  2-19.—A  Navy  Photographer’s  Mate  inspects  prints  for  physical  defects  that  are  exiting  a  processor. Photo by PH2 Sharon Nelms-Thorsvik 2-36







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