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Scratch Test: Difference between revisions

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This method is most useful for evaluating [[Slap Scratches]] or any scratches with a repeating pattern.
This method is most useful for evaluating [[Slap Scratches]] or any scratches with a repeating pattern.


===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, 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.  


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