FIELD: electrical engineering, can be used for fabrication of printed-circuit boards of wide application. SUBSTANCE: in fabrication of printed-circuit board substrate basalt cloth is impregnated with epoxy binder, basalt thread is a warp and in the base it has a twist factor of 17 to 20, and weft in the cloth is made of quartz threads and has a twist factors of the warp and weft is 1.3 to 1.5. EFFECT: enhanced quality. 5 tbl
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