... some years ago i was involved in developing a silk-screen-printing process for catalytic converters thatz should represent the foamy structure of bones.
They used screens with 50microns wide holes and 20microns spacing and 50 microns thickness, coated them with photoresist, etched the structure of typical bone-meshes and printed a paste made with ceramic dust and some high-temp additives (maybe partially waterglass).
They printed a single layer, let the paste settle some ten seconds, so it went stiff enough to print on it again - moved the screen up, to release from the printed material - displaced some ten microns, and printed new layers on top of the previous.
The result was a big block of foamy ceramics with capilaries through the block, that represented the open holes - but the vertical surfaces were 'chaotic' through the displacement of the screen after every layer.
I think this should be the perfect fabrication methode for bone-like structures from calcite or other bio-degradable dust in an organic binder as paste ...
Viktor
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