Preferred label
Acetate negatives
Alternative labels
Cellulose acetate negatives
Cellulose diacetate negatives
Cellulose triacetate negatives
Diacetate negatives
Triacetate negatives
Broader term
Safety film negatives
Scope note
Acetate safety films were first introduced in the early 1900s. Various types include diacetate and triacetate and are often difficult to distinguish from one another.
History note
Changed 6/94. Formerly, ACETATE NEGATIVES may have been indexed as CELLULOSE DIACETATE NEGATIVES or as CELLULOSE TRIACETATE NEGATIVES.
Change note
Formerly TGMI term & TGMII term.