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Gelatin filters are prone to scratching
if mishandled thus there is need of some special care when using
gelatin filters.
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Handled gelatin filters by the edges
only.
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When there are dirt particles or dust
accumulated on the surface, brushed it off very lightly with a
camel-hair brush or blown off with optical-grade compressed air.
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Do not use lens-cleaning fluid or any
other liquid cleaner.
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Inspect gelatin filter surfaces often for
dust and embedded dirt.
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Gelatin filters should be stored in a
dry, low-humidity environment of no more than 50 percent relative
humidity because the gelatin itself is very susceptible to fungus
growth.
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