provide contrast pigments contemplated for use in certain embodiments of the present invention include any particulate material added solely for the purpose of imparting color to the formulation e g carbon black metal oxides e g fc 2 o 3 titanium oxide and the like when present pigments are typically present in the range of about 0 5 wt up to about 5 wt relative to the base formulation flow modifiers may optionally be employed in the practice of the present invention to alter the resin flow in order to facilitate achieving desired fill and or lamination properties use of such optional additives may thereby 1 enhance intra laminar adhesion and or 2 produce a multi layered board by bonding resinous prepregs to layers comprising etched circuitry when employed in accordance with the present invention such additives are likely to be used at minimum loading levels e g in the range of about 1 up to about 10 weight percent based on the total weight of the formulation to gain the benefit such additives can impart e g enhanced heat and pressure induced flow without compromising other physical and electrical properties flow modifiers contemplated for use herein may be non reactive or reactive i e capable of participating in oxidative cross linking such materials will desirably exhibit.