How to Say "celluloid" in Spanish
The Spanish word for “celluloid” is “film” — B2 level.
English → SpanishB2
nounB2technical/neutral
photographic material

Examples
Puso un film protector sobre la pantalla del teléfono.
He put a protective film on the phone screen.
El técnico analizó el film de óxido que cubría la pieza.
The technician analyzed the film of oxide covering the part.
Technical Use
This meaning is often encountered in instructions, science, or when talking about photography equipment, referring to the actual physical material.
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