shown in the electron micrograph of fig4 taken at a power of 2000 u00d7 an epoxy glass multilayer laminate with drilled thru holes was subjected to a process as described in example 2 with the exception that the laminate was not treated in the potassium permanganate bath optical microscopic examination of the thru holes showed a glossy smooth epoxy surface the laminate was then neutralized glass etched and electrolessly plated as in example 1 the thru holes were optically microscopically examined and massive blistering of metal was seen and poor metal coverage was observed an epoxy glass multilayer laminate was processed as set forth in example 1 with the exception that the laminate was not treated with a solvent prior to the treatment with a potassium permanganate bath a thru hole was examined by a scanning electron microscope as shown in the electron micrograph of fig5 taken at a power of 2000 u00d7 an epoxy glass multilayer laminate was processed as set forth in example 2 with the exception that the laminate was not treated with a solvent prior to the treatment with a potassium permanganate bath the thru holes were examined under an optical microscope and had a glossy smooth appearance prior to electroless copper plating the laminate was then neutralized glass etched and electrolessly plated as described in example 1 and then examined under an optical microscope the thru holes showed poor metal coverage and heavy.