All nitrate film shall be kept in closed containers except during the
actual time it is being worked upon or examined. It shall not be placed or
kept under benches or other shelves which shield it from the discharge of
sprinklers. Scrap nitrate film shall be kept separate from wastepaper, safety
film and other rubbish and shall be kept in steel drums or metal containers
with tight covers. It shall be disposed of at frequent intervals. Discarded
film in full or part rolls shall be kept in such containers, and neither scrap
film nor discharged film shall be baled or burned.
Rewinding of nitrate film shall be performed in a special rewind room
in an approved location or in the projection room. If done in the projection
room, approved enclosed-type rewind machines shall be used and approved. Containers
for scrap film having a self-closing hinged cover shall be provided.
Nitrate motion-picture film used in connection with the projection of
motion pictures (as in theaters, motion-picture theaters, screening or projection
rooms, sound recording studios, television studios and motion-picture titling
studios) shall be limited and kept as follows: The quantity of nitrate film
in any projection room not equipped with an approved system of automatic sprinklers
shall be limited to that given below. If equipped with an approved system
of automatic sprinklers, double the quantity specified may be permitted.
A. In a projection room constructed of brick, hollow tile,
concrete or other approved masonry, not exceeding one hundred twenty-five
(125) pounds [twenty-five thousand (25,000) feet of thirty-five-millimeter
film].
B. In a projection booth constructed of metal frame covered
with asbestos board or sheet iron, not exceeding seventy-five (75) pounds
[fifteen thousand (15,000) feet of thirty-five-millimeter film].
No collodion, emul acetate or other similar flammable cement or liquid
in quantities greater than one (1) pint shall be kept in the projection booth.
Splices in film shall be made on mechanical cutting and splicing machines.