MARC21-007: Kind of material of sound recording
acetate tape with ferrous oxide
Acetate base with a ferrous oxide coating.
c
May include acetate tape and belts, such as magnabelts.
aluminum with lacquer
Aluminum disc base with a lacquer coating.
i
cellulose nitrate
Cellulose nitrate base.
b
used for items such as memovox discs.
glass with lacquer
Glass disc base with a lacquer coating.
g
lacquer coating
Lacquer coated, but the base material on which the lacquer is applied is not identified.
a
metal
Made entirely of metal.
l
Includes the earliest cylinders, which were made of tinfoil, and aluminum transcription discs with no coating, as well as wire and metal tape.
not applicable [obsolete]
n
other
Kind of material other than lacquer coating, cellulose nitrate, acetate tape with ferrous oxide. glass with lacquer, aluminum with lacquer, metal, plastic with metal, plastic, paper with lacquer or ferrous oxide, shellac, wax.
z
paper with lacquer or ferrous oxide
Paper or cardboard disc, tape, or cylinder base with a lacquer or ferrous oxide coating.
r
plastic
Made entirely of plastic.
p
Also includes mylar, polyester and vinyl materials. Since the 1950s, commercial or mass-produced sound recordings on 16, 33 1/3, and 45 rpm discs, cassettes, and cartridges are made of plastic.
plastic with metal
Made of plastic base with a metal coating.
m
The metal part of such an item is often a thin layer applied to the plastic base. Includes compact audio discs (CDs).
shellac
Made entirely of shellac.
s
Most commercial or mass-produced 78 rpm discs are made of shellac.
unknown
Kind of material used in the manufacture of the item is not known.
u
wax
Made entirely of wax.
w
Most instantaneous cylinders were made of wax.
Published