A-A-51271
10 December 1985
COMMERCIAL ITEM DESCRIPTION
COVER GLASS, MICROSCOPE SLIDE
The General Services Administration has authorized the use of this commercial item description in preference to Type II Thickness No. 1 Cover Glasses of Federal Specification NNN-C-1434C.
This commercial item description covers microscope slide cover glasses for microscopic observation.
Salient characteristics:
The covers glasses shall be transparent and colorless.
The side lengths shall be as specified with a tolerance of ± 1.0 mm.
The thickness shall be 0.13 to 0.17 mm, and the thickness of a single cover glass shall not vary more than 0.01 mm when measured with a standard cover glass gauge or micrometer thickness gauge.
No color shall be visible along the edges of or through superimposed cover glasses when subjected to a standard commercial test for solubility using a phenolphthalein solution or equivalent.
Cover glasses shall be capable of conforming to a 4-1/2 inch diameter mandrel with the largest dimension of the cover glass at right angle to the axis of the mandrel. Each cover glass shall be bent one time only.
The unit package shall be a plastic container of suitable size to contain a one-ounce quantity of cover glasses with a hinged lid and snap-type closure. The cover glasses shall be held in an upright position permitting ready dispensing when the container is opened. The interior of the container shall be cushioned with a lint-free material to insure protection of cover glasses and to insure against spilling when the container is opened. Container closure shall be adequate to prevent spilling of contents under normal handling. As an alternative to the hinged container, the unit package shall be a container of suitable size with a molded plastic bottom section and a top fabricated of plastic, fiberboard, or heavy chipboard.
Workmanship. The cover glasses and container shall be free from defects which detract from their appearance or impair their serviceability.
Unit. Package (PG). One package containing a quantity of cover glasses of one size and thickness, weighing a minimum of ounce, constitute one unit.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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