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The broad aim of this paper is to explore the potential and limitations of offset lithogaphy for a wide range of hitherto unrecognised applications in materials processing. Lithographic printing of metal powders provides a rapid manufacturing pathway for the production of circuit tracks. The ability to superimpose functional ceramic inks by multiple registration would confer a capability to add on-board sensors, sounders, actuators and other discrete components. In order to take full advantage of this high speed printing technology and apply it generally to ceramic and metal powders, perhaps in combination with polymer films, the range of acceptable ink properties needs to be defined and the ink properties must be related to print quality and to characteristic print defects. In this investigation, a range of lithographic inks containing ascending TiO2 volume fractions and a selection of dispersants was formulated and tested. The flow properties and emulsion characteristics were related to the quality of deposition in a conventional, single-colour, automatic lithographic press. |
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