MARC21       007g'04  Base of emulsion
     Values: 
              #   Not a motion picture [obs.]
              #   No attempt to supply code [obs.]
              d   Glass
              e   Synthetic
              j   Safety film
              k   Film base, other than safety film
              m   Mixed collection
              n   Not applicable [obs.]
              o   Paper
              u   Unknown
              z   Other