"This specification covers finished fabrics woven from ""E"" glass electrical grade glass fiber yarns that are intended as a reinforcing material in laminated plastics for electrical and electronic use. All fabrics covered by this specification are plain weave. Purpose This specification determines the nomenclature@ definitions@ general and chemical requirements for the glass@ and physical requirements for finished woven glass fiber fabrics. Designation Appendix II of this standard provides a style designator for each finished fabric glass style@ with specifications on yarn@ fabric count@ thickness and weight in both SI and US system. Fabrics listed in Appendix II also categorize fabrics by their current availability status."