MIL-DTL-24671C(SH)
3.1.5 Lint and foreign material.
3.1.5.1 Grade 1. The cloth shall be free from loose thread, ravelings, lint and fluff from
cloth or yarn or particles of a size visible to the unaided eye. The cloth shall also be free of any
visible foreign particulate matter, dirt or grease either embedded in the cloth or adhering thereto.
3.1.5.2 Grade 2. The cloth shall be free from loose thread, ravelings, lint and fluff from
cloth or yarn or loose particles of a size visible to the unaided eye. Each cloth may contain no
more than five specks or stains of no visible thickness, and no speck or stain may exceed 1/16
inch in any dimension. Non-white threads woven into the fabric are acceptable.
3.1.6 Finish. The fabric shall be free of sizing and be bleached white.
TABLE I. Physical requirements.
Characteristics
Requirements (same for grade 1 and grade 2 unless
otherwise indicated)
Minimum
Maximum
Weight, ounces per square yard
2.8
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Yarns, per inch
Grade 1 or 2, plain weave
Warp
70
100 1/
Filling
70
100 1/
Grade 2, twill weave
Warp
100
130
Filling
50
80
Breaking strength, pounds
Warp
45
---
Filling
30
---
Tearing strength, grams (newtons)
Dry
Warp
880 (8.6)
---
Filling
480 (4.7)
---
Wet-water
Warp
1040 (10.2)
---
Filling
720 (7.1)
---
1/
For Grade 1 cloth, the aggregate yarn count in both the warp and fill directions shall be
not less than 150 yarns per square inch in addition to meeting the minimum yarns per inch
specified.
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