A-A-1808B
TABLE III (cont.)
Examine |
Defects |
Classification |
|
Major |
Minor |
||
Construction and Workmanship |
Silver plating not smooth, not fine grained and not free from blisters, porosity, indications of burning, or excessive edge build up (Type I items) |
X |
|
|
|||
Identification |
Missing, not legible, incomplete, incorrect, or not in proper location |
|
X |
Surface opposite markings show signs of penetration |
X |
|
Testing of the end item. Sample units shall be tested in accordance with the applicable paragraphs under Testing. The sample size, except for the alternate method below, shall be a minimum of 72 items of flatware, randomly selected from each inspection lot. Failure of any sample to pass any applicable test specified shall be cause for rejection of the lot.
Tests.
Hardness. Blade samples shall be tested for compliance with the knife blade paragraph as specified in ASTM E 18. Hardness readings shall be determined at a minimum of 3 locations; point, center, and 1 inch from the shoulder of the knife blade. Any hardness not within specified limits shall be considered a failure of the test.
Corrosion test. Steel samples shall be tested as follows for compliance. Three drops of copper sulfate solution shall be placed at intervals on the cleaned surface of the blade of each sample. After remaining on the blade for 6 minutes, the solution shall be washed off with clean water. Any visible indication of staining shall be considered failure of the test. The copper sulfate shall be mixed as follows:
Copper sulfate (CuSO4 -5H20) |
4 grams |
Sulfuric acid (H2SO4) (Ssp. Gr. 1.84) |
10 ml |
Water (H2O) |
90 ml |
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