(a) The following tests must be performed on microfilm as indicated.
(1) Methylene blue test. (2) Density test. (3) Resolution test. (b) Original processed microfilm must be visually inspected according to the following procedures. (1) Within two weeks of completion of the methylene blue test, a visual inspection of microfilm must be completed toverify legibility. (2) Film of essential records or records having a retention period of 10 years or more must be inspected image by image. (3) Film of non-essential records having a retention period of less than 10 years must be inspected at least every three meters (10 feet) of each roll or every third fiche. (4) Images of documents must be uniformly placed on the film and must be free of any defects in the filming area that would interfere with the documents being read. (5) If a defect is found on any microfilm, the microfilm immediately preceding and following the sample of microfilm on which the defect was found must be inspected. If a defect is found on those microfilms, the uninspected microfilm preceding and/or following those microfilms must be inspected image by image until all defective film has been identified. (c) Testing and Inspection of Equipment. (1) Cameras and ancillary equipment must be calibrated, tested, or otherwise inspected and adjusted at least twice annually or more often if required to comply with manufacturer's specifications or recommended operating and maintenance procedures. (2) Processors must be monitored on a scheduled basis with process control strips (sensitometric strips) at a minimum at the start of processing each day and whenever a batch of film, fixer, or developer is changed, or when changes in processing such as replacement or addition of filter, water softener, or replenishing system are made, or when water is changed.
Source Note: The provisions of this §6.25 adopted to be effective June 12, 1996, 21 TexReg 4989.