MIL-DTL-43685C
3.5.1 Visual shade matching (all classes). The color and appearance of the tape and webbing
shall match the standard sample when viewed using the AATCC Evaluation Procedure 9, Option
A, under filtered tungsten lamps that approximate artificial daylight D75 illuminant with a color
temperature of 7500 + 200 K illumination of 100 + 20 foot candles, and shall be a good match to
the standard sample under horizon lamplight at 2300 + 200 K.
3.5.2 Colorfastness. The finished webbing and tape shall show fastness to light and
laundering equal to or better than the standard sample or equal to or better than a rating of "2-3"
on the AATCC Gray Scale for color change for fastness to light and "3-4" for fastness to
laundering. Testing shall be as specified in 4.4.2.
3.6 Physical requirements. The construction and physical requirements of the finished
webbing and tape shall be as specified in Table I.
TABLE I. Physical requirements
Characteristic
Type I
Type II
Width (inch)
5/8 -1/32 +1/16
1 ± 1/32
Thickness (inch)
0.040 min. - 0.055 max. 0.015 min. - 0.025 max.
Weight oz./lin. yd. (max)
0.45
0.30
Breaking strength, lb. (min)
650
525
Ends in warp (min)
Face and back
158
276
Binder
9
-
Stuffer
40
-
Filling yarns per inch (min)
48
30
Filling yarns per inch (min), (shuttleless)
96 1/
60 1/
1/ Two picks per shed.
3.7 Weave. The weave for the webbing and tape shall be as specified in 3.7.1 and 3.7.2.
When shuttleless construction is used a catchcord shall be utilized.
3.7.1 Type I. The webbing shall be a double fabric consisting of face and back warps with
two ends weaving as one and a stuffer warp, all bound together by a binder warp with the ends
weaving singly. The stuffer ends shall weave between the face and back warps and shall not
show on either the face or the back. The face warp shall weave plain weave with the picks that
show on the face. The back warp shall weave plain weave with the picks that show on the back.
The binder warp shall weave plain weave throughout.
3.7.2 Type II. The tape shall be plain weave, except that the warp ends shall weave two ends
as one.
3.8 Finish. The webbing and tape shall be scoured and heat set in order to meet the shrinkage
requirement specified in 3.9.
4
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