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Scratch Test: Difference between revisions
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→Reel-to-Reel Method
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===Reel-to-Reel Method=== | ===Reel-to-Reel Method=== | ||
Prepare 50-100' of test film on a house reel. Project as normal, rewind, and repeat several times (50-100 is ideal, 10-15 may be more practical). Check for scratching on screen and/or on the bench when rewinding. Keep track of base and emulsion side so you can evaluate if anything shows up. | Prepare 50-100' of test film on a house reel. Project as normal, rewind to maintain the same orientation, and repeat several times (50-100 is ideal, 10-15 may be more practical). Check for scratching on screen and/or on the bench when rewinding. Keep track of base and emulsion side so you can evaluate if anything shows up. | ||
This method is most useful for evaluating vertical scratching. | This method is most useful for evaluating vertical scratching. | ||