Vaults full of silver for the emulsion
b/w 1927
:06.12  134-102111
Motion picture film, manufacturing

The silver after it is dissolved in nitric acid
b/w 1927
:11.02  134-123329
Motion picture film, manufacturing

Mixing nitrate crystals, potassium bromide and gelatine in hot water
b/w 1927
:11.18  134-135317
Motion picture film, manufacturing

The emulsion is coated on large sheets of celluloid
b/w 1927
:09.01  134-142400
Motion picture film, manufacturing

Perforating machine
b/w 1927
:07.20  134-155822
Motion picture film, manufacturing

CU Perforating machine
b/w 1927
:04.04  134-162012
Motion picture film, manufacturing

Wrapping the raw stock up in black paper
b/w 1927
:14.17  134-165417
Motion picture film, manufacturing

Boxing the final product for market
b/w 1927
:25.25  134-173413
Motion picture film, manufacturing