This specification covers finished fabrics woven from aramid 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 requirements, and physical requirements for finished woven aramid fiber fabrics.

Classification This standard provides two classes of tolerances on physical characteristics of the fabric which are useful for identifying degrees of precision needed to meet design/performance requirements of the printed wiring board.

In the event of conflict between design requirements and classes, as