MIL-PRF-3122J
Note: A fine hair cell embossed pattern may be applied to the grain surface of the side. Printed
leather shall not be permitted. If embossed, the leather shall match the standard sample for fine
hair cell pattern. Leather previously dyed or finished in a color not specified and then redyed or
refinished a specified color shall not be acceptable.
3.4 Fungicide. Unless otherwise specified (paragraph 6.2), one of the following leather
fungicides is required.
3.4.1 TCMTB. The leather shall contain not less than 100ppm and not more than 400ppm of
active ingredient 2- (thiocyanomethylthio) benzothiazole (TCMTB), (see paragraph 4.4.1).
3.4.2 Ortho- Phenyl Phenol. The leather shall not contain less than 540 ppm and not more than
2580 ppm. (see paragraph 4.4.2)
3.4.3 Diiodomethyl para Tolylsulfone. The leather shall contain not less than 300 ppm and not
more than 2000 ppm. (see paragraph 4.4.3)
3.5 Water resistant treatment. When treatment A, B or A/B is specified, the leather shall meet
the following requirements as applicable.
3.5.1 Treatment A (water absorption). When treatment A is specified, specimens of the leather
shall gain not more than 30 percent of their weight by water absorption when tested as specified
in paragraph 4.3.
3.5.2 Treatment B (water penetration). When treatment B is specified, at least 80 percent of the
specimens tested shall withstand not less than 15,000 cycles by ASTM D2099 or not less than
4,000 cycles by ASTM D2098 without water penetration, when tested as specified in paragraph
4.3.
3.5.3 Treatment A/B (water absorption/penetration). When treatment A/B is specified,
paragraphs 3.5.1 and 3.5.2 shall apply.
3.6 Tearing strength (slit tear) Type I. At least 80 percent of the specimens tested shall have
tearing strength values not less than 28 pounds and none below 20 pounds when tested as
specified in paragraph 4.3.
3.7 Stitch tear strength Type II. At least 80% of the specimens tested shall have stitch tearing
strength values not less than 30 pounds when tested as specified in paragraph 4.3.
3.8 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible provided
that the material meets or exceeds the operational and maintenance requirements, and promotes
economically advantageous life cycle costs.
3.9 Chemical requirements. The leather shall conform to the chemical requirements in Table I
when tested as specified in paragraph 4.3.
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