Table 6-18. Description of Film Artifacts - Continued

Table 6-18. Description of Film Artifacts - Continued - TM-1-1500-335-23_595

TM-1-1500-335-23 Nondestructive Inspection Methods Manual
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T.O. 33B-1-1 Table 6-18. Description of Film Artifacts - Continued Condition Cause Remedy 23. Puckered or net-like Reticulation. Film Maintain all processing solutions and linkages processed through extreme wash water at approximately same tem- temperature changes. perature, 68^oF. 24. Blisters Reaction between alkaline Maintain correct solutions by following developed and acid-fixing manufacturer’s directions. bath. 25. Water on screens White blotches on film. Dry screens. Do not use for 24 hours. 26. Dark areas on film Exposure to light. Light leaks in corners of exposure holders. Test film by developing without exposure to X-rays. 27. Spots on radiograph Moisture on screen. Do not allow film to remain in lead screen exposure holders overnight in humid at- mosphere. 28. Either dark or light ar- Films stuck together during Agitate film during processing to assure eas on film, depending processing. solution penetrates emulsion. where in the process this occurs. 29. White dots on film Unclean screens. Clean lead screens with steel wool and soap periodically. 30. Surface of film is dis- Dichroic (chemical) fog. Change developer and short-stop since colored when viewed by re- this condition is usually the result of ex- f lected light hausted solutions. 31. Unexplained shadowed Non-uniform light pattern Change lamps to correct filament pattern area on film from illuminator. and select f luorescent lamps to match in light response. Table 6-19. Deleted 6.7.20 Care of Radiographs. The final radiograph represents a considerable investment of time and money, and great care should be taken to preserve the final image. 6.7.20.1 Handling of Radiographs. The radiographs should not be handled with bare hands. Soft white cotton gloves should be used to handle all radiographs between the time they are processed and the time they are disposed of. The film should not be crimped or sharply bent. Foreign substances such as water, coffee, or other materials should not be allowed to contact the emulsion surfaces. The films should always be picked up carefully, never sliding them across surfaces that may be dirty or have Change 3 6-88.1/(6-88.2 Blank)

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