BS EN ISO 3303-1:2020 pdf free.Rubber- or plastics-coated fabrics Determination of bursting strength.Steel-ball method. BS EN ISO 3303-1 Take five test pieces across the usable width of the sample (see NOTE), at least 1 mm from the extremity of the sample, and of sufficient size so that each test piece can be clamped firmly in the clamping system of the...