Motion Picture Film Storage & Protection Information

When film reaches an allow moisture equilibrium after manufacture, it is carefully put into a film can and sealed with magnetic tape. The can is nowadays normally impervious to normal levels of relative humidity, but some cans may rust. short term storage in gloomy or eminent proportional humidity is n’t immediately threatening sol long as the packages of raw film persist sealed .
cold temperatures are best for slowing the inevitable changes in sensitivity. If naked stock must be kept for periods of up to 3 months, temperatures of 13°C ( 55°F ) or less are appropriate. If bleak sprout must be kept longer than 3 months, freezing at -18° to -23°C ( 0 to -10°F ) is recommended. After any cold memory, be indisputable to allow the films to equilibrate slowly to the ambient temperature where it will be used. This is necessary to prevent moisture condensation and blemish. condition time will vary with the thickness of the packages and the temperature and dew charge of the outside air. A 100-foot roll of 16 mm can take ampere fiddling as 1/2 hour to condition whereas a 1000-foot roll of 35 millimeter may take up to 3 hours. Do not open the packages if they feel colder than the ambient temperature. Always use films soon after purchasing.

crude standard must be protected against harmful gases and radiation sickness. Some of the harmful gases are formaldehyde, hydrogen sulfide, hydrogen peroxide, sulfur dioxide, ammonia, char gasoline, and automobile locomotive exhaust. besides to be avoided are vapors from solvents, mothballs, cleaners, turpentine, mold or fungus preventives, and mercury. The chemical vapors can attack the photographic emulsion. Some of the vapors may slowly penetrate the tape that seals the film can. You may be shocked at how many of these gases, vapors, and fumes are in your closets or storage rooms.

Some, such as ammonia, formaldehyde, and hydrogen sulfide ( rotten eggs ), are easily recognized by their sharply, pungent odors. Of these three, let ‘s look at the one that may be the least familiar, formaldehyde. You may associate this multi use chemical only with biological specimens. Formaldehyde can be all around us in products, such as the particle board and plywood in walls, cabinets, or furniture and besides in some types of insulation and many adhesives and synthetic fibers.

raw stock must be kept aside from excessive heat and body of water which would make it brassy. The temperature in a closed automobile in the sun can well register over 55°C ( 130°F ). This reasonably flimsy material film is particularly sensitive until it ‘s exposed and properly processed. An area of particular refer for protecting raw stock is radiation, whether it be an obvious source or ambient. Always march film soon after being exposed to lessen the casual of contamination .

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