A fine, tightly woven fabric made from continuous E-glass yarns in plain or twill weave, with a smooth, lightweight and slightly translucent surface. Common styles include electronic-grade 7628 and 1080, typically in the 0.1–0.3 mm thickness range, with weight and width customizable on request. It offers good electrical insulation, dimensional stability and resin wet-out, and is widely used for copper-clad laminate (FR-4) substrates, electrical insulation laminates, mica tape backings and thin composite laminates.