MIL-C-21067C (MI)
TABLE I. Quality conformance inspection.
INSPECTION
REQUIREMENT
TEST PARAGRAPH
PARAGRAPH
Viscosity
3.3.1
4.6.1
Solids
3.3.2
4.6.2
Tensile strength
3.3.3
4.6.3
Ultimate elongation
3.3.4
4.6.3
Adhesion, initial
3.3.5
4.6.4.2
Color
3.8
4.6.4.5
4.5.1 Lot. A lot shall consist of all the material submitted for acceptance at the
same time, which has been produced by one manufacturer in one continuous operation
without change in materials or processes, but shall consist of a quantity not greater
than 2500 lbs.
4.5.2 Sampling. Sampling to verify conformance to section 3 requirements
shall be performed in accordance with table II. Each container in a lot shall be
considered as a unit of product.
TABLE II. Sampling plan.
LOT SIZE
SAMPLE SIZE
1 to 13
100 %
14 to 150
13
151 to 280
20
281 to 500
29
501 to 1200
34
1201 to 3200
42
* In all cases: Acceptance number is ZERO
Rejection number is One
4.6 Test procedures.
4.6.1 Viscosity. Viscosity of the coating compound shall be determined with
either a Brookfield or a McMichael viscosimeter, or equivalent. The test shall be run
in duplicate using a new sample of material for each determination. Both the sample
of coating compound and the apparatus shall be conditioned at the testing temperature
of 27º ± 5ºC for 4 hours before testing (see 3.3.1).
4.6.2 Solids content.
4.6.2.1 Procedure. A covered low-form weighing bottle shall be weighed, and
approximately 10 grams of thoroughly mixed coating compound shall be poured into
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