'Film stock is the term for photographic film on which motion pictures are shot and reproduced.'
http://en.wikipedia.org/wiki/Film_stock

'film stock = onbelichte film' (Van Dale EN-NL).

Wat achtergrondinfo:
'Who isn't familiar with The 7th Voyage of Sinbad? It was Harryhausen's first Dynamation film in color, a commercial necessity which presented all kinds of technical problems. Harryhausen had just perfected the effects process in B&W in 20 Million Miles to Earth. But the few dupe and intermediate color film stocks available in 1958 required Ray to rethink all of his tricks in order to get a finished image with colors that could be timed to look normal. Except for the occasional conventional travelling matte shot Harryhausen did all of his movie magic in the camera through multiple exposures; he was lighting, animating, and compositing all in one go.'
http://www.dvdtalk.com/dvdsavant/s125sinbad.html

http://nl.wikipedia.org/wiki/Kleurenfilm