distinct from the conduits 36 the mass of material which is manipulated to form the framework 32 can be any suitable material including thermoplastic resins and photosensitive resins but the preferred material for use in forming the framework 32 of the present disclosure is a liquid photosensitive polymeric resin likewise the material chosen can be manipulated in a wide variety of ways to form the desired framework 32 including mechanical punching or drilling curing the material by exposing it to various temperatures or energy sources or by using a laser to cut conduits the method of manipulating the material which will form the framework 32 of course can depend on the material chosen and the characteristics of the framework 32 desired to be formed from the mass of material preferably the photosensitive resin is manipulated by controlling the exposure of the liquid photosensitive resin to light of an activating wavelength since the reinforcing structure 33 is positioned between the first surface 34 and at least a portion of the second surface 35 of the framework 32 the second surface 35 of the framework 32 can either completely cover the reinforcing structure 33 cover only a portion of the reinforcing structure 33 or cover no portions of the reinforcing structure 33 and lie entirely within the interstices 39 of the reinforcing structure 33 the conduits 36 have a channel portion 41 which lies between the conduit openings 42 and 43 these channel portions 41 are defined by the walls 44 of the conduits 36 fig2 4 show that the holes or channels 41 formed by the conduits 36 extend through the entire thickness of the.