A-A-2681
4.6.3 Length and width. The length and width of the sheet shall be measured with a calibrated steel rule.
4.6.4 Thickness. Thickness measurements shall be made with a calibrated micrometer or other equivalent instrument capable of measuring to 0.0001 inch.
4.6.5 Surface characteristics.
4.6.5.1 Penciling and erasing. Single lines approximately 0.4 mm in width and two inches in length shall be drawn on different portions of the sample with a black graphite No. 2 pencil, held in a vertical position under a pressure of 165 grams, and then erased with a soft, nongravity eraser. There shall be no appreciable change of color of the erased surface, no smudging and no ghosting. The surface shall withstand at least four such erasures of lines drawn and redrawn in exact line of previous drawing without leaving ghosts or traces of sufficient intensity to produce an image on blueprints and without impairing the surface for future reproductions of all types.
4.6.5.2 Inking and erasing. Single lines of varying widths of black waterproof drawing ink shall be drawn on different portions of the sample. There shall be no appreciable spreading, feathering, ragged edges, or skips. Five minutes after the lines have been drawn, they shall be erased with a soft, nongravity eraser. Ink lines shall then be drawn on the erased surface. There shall be no spreading and feathering. The plastic sheet shall withstand four such erasures and redrawing of lines.
4.6.6 Adhesive bond. The adhesive bond shall be determined in accordance with ASTM D 3330, Method A.
4.7 Examination for preparation for delivery. A random sample of shipping containers shall be selected from each lot for examination of the unit, intermediate and shipping containers (as applicable) for conformance with the preservation, packaging, packing, labeling, and marking required in the contract or order. Samples shall be selected in accordance with MIL-STD-105, inspection level S-2, acceptable quality level (AQL) 6.5, expressed in terms of defects per hundred units.
5. PREPARATION FOR DELIVERY
5.1 Preservation, packaging, packing, labeling and marking. The preservation, packaging, packing, labeling, and marking shall be as specified in the contract or order.
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