Figure 2-19.—A Navy Photographer’s Mate inspects prints for physical defects that are exiting a processor

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