Electric Paint Technical Data Sheet English PRODUCT DESCRIPTION Electric Paint is a nontoxic, water based, water soluble, electrically conductive paint. It can be used in circuits as a painted resistor element, a capacitive electrode or can function as a conductor in designs that can tolerate high resistivity. It is intended for applications with circuits using low DC voltages at low currents. Electric Paint adheres to a wide variety of substrates and can be applied using screen printing equipment. Its major benefits include low cost, solubility in water and good screen life. It is black in colour and can be over-painted with any material compatible with a water-based paint. ADVANTAGES / PRODUCT BENEFITS High sheet r esistance Nontoxic Water-soluble Can be used to create capacitive touch and proximity sensors Can be used as a potentiometer or resistive circuit element Compatible with many standard printing processes Low cost TYPICAL PROPERTIES Colour / Black Viscosity / Highly viscous and shear sensitive (thixotropic) Density / 1.16 g/ml Sheet Resistance / 55/sq at 50 micron film thickness Vehicle / Water-based Drying Temperature / Electric Paint should be allowed to dry at room temperature for 5 15 minutes. Drying time can be reduced by placing Electric Paint under a warm lamp or other low intensity heat source. See below summary table of typical properties. PROCESSING AND HANDLING Screen Printing Equipment / Manual Screen Types / Polyester, stainless steel (43T 90T gauge mesh) Typical Cure Conditions / Room temperature (24C) for 15 minutes Typical Circuit Line Width / 0.5 10mm (43T-mesh stainless steel screen) Clean-up Solvent / Warm water and soap Sheet Resistance / Approximately 32/sq when using a brush or manual screen printing Shelf Life / 6 months after opening Storage / Electric Paint should be stored, tightly sealed in a clean, stable environment at room temperature. Composition should be thoroughly mixed prior to use. See below graph to predict resistance using manual screen printing. First Floor, 98 Commercial St London E1 6LZ, United Kingdom +44 0 207 650 7977 2017 / Bare Conductive Ltd. info bareconductive.com 1TYPICAL PROPERTIES TABLE TABLE 1 TYPICAL PHYSICAL PROPERTIES TEST PROPERTIES Sheet Resistance at 50 micron film thickness (/sq) 55 Density (g/ml) 1.16 TABLE 2 COMPOSITION PROPERTIES Viscosity Thixotropic Thinner Water Table 1 and 2 show anticipated physical properties for Electric Paint based on specific controlled experiments in our labs when applied highly accurately. For more realistic values for application of the paint with brushes and screen printing see the below graph and equation. Further notes on working with Electric Paint can be found in Application Notes. PROCESSING GRAPH AND EQUATION When processed using manual screen printing one can expect a sheet resistance of approximately 32/sq. The below graph illustrates how resistance changes with line shape and a simple equation can be applied to roughly predict surface resistance: Resistance = 19.77(length/width) + 12 RESISTANCE 3000 2500 2000 1000 50 32 1 50 100 150 RATIO (L/W) 10mm x 10mm Shape 1250mm x 10mm Shape First Floor, 98 Commercial St London E1 6LZ, United Kingdom +44 0 207 650 7977 2017 / Bare Conductive Ltd. info bareconductive.com 2