A-A-54143
The flammability of the finished blanket shall conform to class 2 of the National Fire Protection Association (NFPA), Standard 702, Flammability of Wearing Apparel, except that flame spread shall be 10 seconds or more at a 45 degree angle.
The finished cloth shall not be flame retardant treated. All the sewing operations shall be performed with a soft finish, unbleached or white and tints, cotton thread, Ticket No. 30, 3 ply, with a 3 pound minimum breaking strength. The blanket shall be fabricated from one piece of the cloth without any joining seams, rectangular in shape, with hemmed ends. The minimum weight of the size 1 blanket shall be 2.4 pounds. The minimum weight of the size 2 blanket shall be 9.3 ounces.
Each blanket shall be fabricated from one piece of the blanket cloth with selvaged sides. Each end shall be turned down with each raw edge turned under, for 1/2 inch plus or minus 1/8 inch, to form a hem 1 inch plus or minus 1/8 inch wide. The seam shall be produced by turning the edge of the material, folding it back over the body of the material, and stitching the turned and folded portion to the body of the material with two rows of stitches, a minimum of six stitches per inch. A lockstitch (type 301), chain stitch (type 401) or safety stitch (type 402) shall be used. Each hem shall be sewn with two rows of stitching, 3/16 to 5/16 inch apart, in a manner that shall catch the turnunder. No side of the size 1 blanket shall be hemmed. The size 2 blanket may have full length plain woven side borders, or one or two hemmed side borders. The blanket may contain a centered plain weave stripe, approximately 2 inches wide, in the entire length of the blanket. The leno weave shall be in the length direction.
Each row of stitching shall be straight and parallel to the seam edge. The straightness of the stitching, in any row, shall be maintained within a tolerance of plus or minus 1/32 inch. The ends of lockstitching shall be backstitched, by overlapping on themselves, a minimum of 1/2 inch. Each thread break, skip, and run-off, shall be overstitched not less than 1/2 inch. The thread tension shall be maintained so that there shall not be any loose or tight stitching and the lock shall be embedded in the materials sewn together.
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