NOVELTY - Water-based conductive ink composition comprises: an aqueous carrier; acid-washed graphite particles; carbon black particles; and at least one stabilizing ingredient that suspends the acid-washed graphite particles and the carbon black particles in the aqueous carrier, where the stabilizing ingredient comprises dispersants, binders and/or defoamers, and the composition has a total elemental contaminant level of less than 100 ppm, which is the total concentration of aluminum, calcium, cobalt, chromium, copper, iron, potassium, manganese, magnesium, nickel and zinc.    USE - The composition is useful: as primers on a molded part such as an automotive part; for printing intricate circuitry patterns demanded by the electronics industry in high performance applications such as in the preparation of touch pad circuitry; for printing resistors, field emission electrodes, fuel cell catalysts, conductive paper, conductive fabrics or conductive membranes; in various technical fields and for applications to various substrates by various methods such as ink-jet printing, screen printing, dipping, brushing, stenciling or spin-coating onto a flexible substrate or a rigid substrate; and for depositing conductor layers for ultracapacitors.    ADVANTAGE - The composition: reduces or eliminates faradic reactions in electrical devices; minimizes or removes elemental contaminants and with a minimal number of additional ingredients to reduce the number of elemental contaminants introduced through the additional ingredients; allows direct electrostatic over-coating at lower energies, and reducing corona effects and providing uniform coverage; exhibits low levels of shear-thinning; and is stable and usable over a long period of time, and decreasing or eliminating an inconvenience and cost associated with reformulating inks that settle quickly.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the composition, comprising adding at least one polymeric dispersant, at least one acrylic binder, at least one polyvinylpyrrolidone binder, at least one defoamer and water to a first vessel carbon black particles to form a carbon-black grind phase, grinding the carbon-black grind phase, adding at least one polymeric dispersant and water to a second vessel acid-washed graphite particles to form a graphite grind phase, grinding the graphite grind phase and mixing at least a portion of the carbon-black grind phase and at least a portion of the graphite grind phase in a third vessel to form the composition.