A-A-2915A
4.3 Performance Testing: Testing should be performed on components whenever practical as long as recordkeeping renders traceability. Unless otherwise specified tests shall be conducted in atmosphere of twenty-one (21) degrees centigrade + five (5) degrees centigrade and 50% plus or minus 10% relative humidity. Test paper shall be in accordance with A-A-2804A, type III white bond paper having a pH value, average not less than 5.0 with a basis weight of 60 grams per square meter (16 pound, 17 X 22-500). A tolerance of 5% is allowable. Paper for the Machine Writing Test shall have an additional requirement of 160-140 seconds maximum smoothness on both sides using the Sheffield method for the most current TAPPI T538 test method. Alternately, paper conforming to JCP-O-60 can be used as an alternate source.
4.3.1 Drying Time.
4.3.1.2 Drying Time. Place a sheet of paper on a smooth, flat surface and partially cover with a second sheet of paper. Place cylindrical weight, approximately 200 grams and about 25.4 mm (1 inch) on top of the second sheet of paper. Write a five letter word on the exposed portion of the bottom sheet, allow to dry 5 seconds. Immediately thereafter draw the top sheet and weight towards the top of the bottom sheet, across the written characters at a rate of approximately 10 cm per second. The writing should not smear when tested. Examine both sheets for compliance.
4.3.2 Machine Writing Test.
4.3.2.1 The machine test shall be conducted on a Anja model W-10A, Hartley model W10-F, Minitek writing test machines or equivalent capable of testing pens or refills, with the following parameters set:
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Writing Load: |
0.981 N (100 gF) to 1.225 (125 gF). |
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Writing Angle: |
75o + 5o (non varying) Or 60o to 90o (continuously varying). |
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Writing Speed: |
670 cm + 10.0 cm/ min. (22 ft/ min.) |
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Writing Pattern: |
Ellipse |
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Writing Surface: |
Polished stainless steel. |
4.3.2.2 The ink cartridge shall be subjected to the following condition and examined for compliance with the Machine Writing Test after being allowed to return to test temperature and humidity.
Condition. 168 hours (7 days) at 60 degrees C + 2 degrees C in a chamber with the ink cartridges suspended vertically (point down) at 85 to 90% relative humidity.
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