4.4.2 Machine Writing Test.
4.4.2.1 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. |
4.4.2.2 The pen 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 1. 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.
4.4.2.3 After being subjected to the above condition, the ink cartridge shall be written for a minimum distance 1525 meters (5000 feet). Smooth writing shall start within the first 10 centimeters of the writeout without starvation or fluctuation of the line intensity. The laydown shall maintain its relative color intensity throughout the writeout. Visual defects include blobs, skips, dotting and density variations of line intensity. The actual length of each visual defect shall be totaled for each cartridge and shall not exceed 1% of the written line.
Packaging:
5.1 Preservation, packing and marking shall be as specified in the contract or order.
6. Notes:
6.1 Source of Documents. Issues of the following documents, in effect on the date of invitation for bids or request for proposal form a part of this document to the extent specified herein.
6.1.1 Technical Association of the Pulp and Paper Industry (TAPPI): copies of T538 test method may be obtained from TAPPI, Technology Park/ Atlanta, PO Box 105113, Atlanta, Georgia, 30348-5113.
6.1.2 Federal Acquisition Regulation (FAR) may be obtained from the Superintendent of Documents, Government Printing Office, Washington, DC 20402.
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