Abstract
Prototype force sensitive resistors were made using powder-filled inks by offset lithography, a high speed printing process. A carbon-based lithographic ink that dries to form a film with a carbon content close to the percolation threshold for electrical conduction was formulated. Silver-filled, electrically conducting ink was prepared for the electrodes and connecting leads. The substrate was white gloss-art A4 paper. The carbon film resistance was 23 kΩ while the combined resistance of electrodes and leads was less than 2 Ω. The force sensor was tested by repeated loading and unloading.
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