MARC21-007: Emulsion on film of microform
diazo
Sensitized layers composed of diazonium salts that react with couplers to form dye images. The color of the image is determined by the composition of the diazonium compound as well as the couplers used in the process.
b
mixed emulsion
Mixed emulsion.
m
For example, a microfilm may have slices of film with one type of emulsion and other slices with another type of emulsion.
not applicable
Item does not have emulsion on film.
n
Used for microopaques.
other
Emulsion on film other than silver halide, diazo, vesicular, mixed emulsion.
z
silver halide
A compound of silver and halogens.
a
unknown
Emulsion on the film is not known.
u
vesicular
Light-sensitive component is suspended in a plastic layer. On exposure, the component creates optical vesicules (bubbles) in the layers. These bubbles form the latent image. The latent image becomes visible and fixed by heating the plastic layer and then allowing it to cool.
c
Published