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Scratch Test: Difference between revisions
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It is helpful to do a deep and thorough clean of your projector before a scratch test. | It is helpful to do a deep and thorough clean of your projector before a scratch test. | ||
If evaluating for scratches on screen, use a full aperture lens and plate so that the maximum possible image area (including the soundtrack) is visible. | If evaluating for scratches on screen, use a full aperture lens and plate so that the maximum possible image area (including the soundtrack) is visible. It's best to have a second projectionist to observe from the auditorium. | ||
Because film behaves differently when running at full speed, advancing a scratch test by hand is not sufficient. Advancing by hand may be useful in determining if a roller is scratching film, but not so much for determining if your lower loop is hitting the bottom of your intermittent casing, for example. | Because film behaves differently when running at full speed, advancing a scratch test by hand is not sufficient. Advancing by hand may be useful in determining if a roller is scratching film, but not so much for determining if your lower loop is hitting the bottom of your intermittent casing, for example. | ||
If your scratch test passes, you can save your film to use again. | If your scratch test passes, you can save your film to use again. | ||
===Loop Method=== | ===Loop Method=== | ||