composition was prepared in the following manner the organic medium was prepared by mixing 20 0 wt desmocoll 540 polyurethane bayer materialscience llc pittsburgh pa with 80 0 wt dibasic esters obtained from dupont co wilmington del organic solvent the molecular weight of the resin was approximately 40 000 this mixture was heated at 90 u00b0 c for 1 2 hours to dissolve all the resin the second organic medium was prepared by adding 27 0 wt pkhh resin inchem inc to 73 0 wt dibasic esters obtained from dupont co wilmington del organic solvent and heated as above 0 5 fumed silica cabot corp was then added 5 diacetone alcohol obtained from eastman chemical kingsport tenn was added and the entire composition was mixed the composition was then subjected to the three roll mill for one cycle at 150 psi a circuit was fabricated as follows on a 10 mil thick polycarbonate substrate a blanket print of the composition from example 1 was printed with a 200 stainless steel screen and dried at 120 u00b0 c for 10 min a second print of the composition was then printed and dried a pattern of silver lines were printed with dupont silver paste 5042 dupont co wilmington del using a 280 mesh stainless steel screen the patterned lines were dried at 120 u00b0 c for 15.