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SPECIFICATIONS OF WATER PROOFED COTTON CANVAS CLOTH NO . 15/16 OZS .1.The yarn shall be spun and folded evenly and the fabric shall be uniformly woven and free from defect (selvedges shall be firm and straight) .2.Fabric shall be mildew proofed by copper napthanate process .3.Construction of fabric : plain weave .4.Fabric shall be woven wholly from cotton .5.Fold of yarn : warp : 2 ply , weft : 3 ply .6.No. of theards per 5cm warp : 100 min . weft : 50 min .7.Minimum width including selvedges : 90 cm (36 inches) .8.Weight g/m2 :510 -544 . (+ 5%) .9.Breacking load : warp : 1324N . weft : 1177N . (+ 5%) .10.Dimensional change by cold water immersion : 4% waft :1% .11.Resistance of fabric to penetration by water (hydrostatic head test :30 cm) .12.Resistance of fabric of absorption (static immersion test) 30% .13 .Resistance of fabric to suface wetting (spray test) : 80 .14.Cone test : 24 hours before the first drop water passes through fabric .15.Color fastness :-daylight : 4 .-washing (ISO2) 3 depth of color : 4 staining .-water : (ISO2) 4 depth of color : 4 5 staining .-Tol : 5 % .16.Color : Green olive .