Useful for cutting organic composites. Index weathering Exposure of plastics to the outdoor environment. The particular manner in which a fabric is formed by interlacing yarns. Usually assigned a style number. Index weeping Slow leakage manifested by the appearance of water on a surface.
Index weft The transverse threads or fibers in a woven fabric.
Those fibers running perpendicular to the warp. Also called fill, filling yarn, or woof. The mark visible on a finished part made by the meeting of two flow fronts of plastic material during molding. Also called weld mark or flow line. A bolted joint in which sealant is applied to the head and shank of the fastener so that after assembly a seal is provided between the fastener and the elements being joined.