MIL-P-85878
3.16.2 Thickness tolerance. The nominal thickness of the plastic sheet furnished shall be 0.030 inch (0.76 mm). The actual thickness of the sheet at any point shall be 0.03 +0.004 inch (0.76 mm + 0.10 mm).
3.16.3 Light transmittance. The total visible light transmittance for light of daylight quality shall be at least 6 percent.
3.16.4 Total spectral transmittance. The spectral light transmittance of the material shall not exceed 1 percent throughout the wavelength range from 540-700 millimicrons.
3.16.5 Diffuse spectral transmittance. The diffuse spectral transmittance shall not exceed 12.5 percent at a wavelength of 450 millimicrons.
3.17 Identification marking. Each plastic sheet or its attached covering shall be marked with the specification number, the nominal thickness, and the manufacturer's code designation for his approved product. If the marking specified is not plainly visible with the protective covering on the material in place, the same information shall be legibly marked on the protective covering of each sheet in such manner that the markings produced will not be damaged by contact incident to normal handling during shipment.
3.18 Workmanship. Workmanship shall be in accordance with high-grade commercial practice for this class of work.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use their own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to ensure that the supplies and services conform to prescribed requirements.
4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractor's overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements; however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material.
4.2 Classification of inspections. The inspection requirements specified herein are classified as follows:
(a) First article inspection (4.3) (b) Quality conformance inspection (4.4)
4.3 First article inspection.
4.3.1 First article samples. The first article test samples shall consist of a sufficient number of plastic sheets to provide enough test specimens for the first article tests specified in 4.3.2.
4.3.2 Tests. First article tests shall consist of all the examination and tests specified under 4.5 and 4.7.
4.3.3 Test report. A report reflecting the complete results of all first article examinations and tests, including explanation for failures, shall be submitted in triplicate for approval prior to commencing production. The record of the test shall be listed in the report as specified in 4.6.
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