A-A-979A
June 18, 1986
SUPERSEDING
A-A-979
May 12, 1980
COMMERCIAL ITEM DESCRIPTION
MULTI-STRIKE TYPEWRITER RIBBONS
The General Services Administration has authorized the use of this
Commercial Item Description
This commercial item description covers multi-strike typewriter ribbons.
Salient characteristics.
Ribbons shall consist of a continuous length of plastic film coated on one side with black imaging material, and have an appropriate leader, trailer, and visible warning signal.
Ribbons shall be of the dimensions established by the machine manufacturer for proper operations, and be firmly, evenly, and uniformly wound in cartridges, or on spools or cores designed for proper operation with the machines specified (see note).
Composition and application of the imaging material shall be such that it does not offset from one layer to the next.
When properly installed in accordance with, the machine manufacturer’s instructions the ribbon shall not tear nor be cut through during the typing operation and take up smoothly, evenly, and completely.
The ribbons shall produce black impressions which are of uniform density, clean, legible and sharp, without smears or smudges and suitable for reproduction processes.
Workmansip. The plastic film shall be free from holes, tears, or blisters; the imaging material shall be smoothly and evenly applied and of uniform thickness; and the ribbons free of defects such as pinholes, foreign material, streaks or other imperfections which could adversely affect performance and
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