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Maybe a bit too incredible. How do thick-walled materials have their hydrogen bonds restored? This process seems rather more involved than regular 3D printing.

• lsaferite 10y ago
  Sounds like they soak the print in a NaOH solution. I imagine if the material is porous enough to evaporate acetone, it's also porous enough to absorb a NaOH solution.
  • digi_owl 10y ago
    Just in case someone else gets bogged down in chemistry, NaOH is better known as lye or caustic soda.
    • lsaferite 10y ago
      They called it Sodium Hydroxide in the article as well. :)
• Para2016 10y ago
  Maybe it doesn't penetrate through the walls entirely - perhaps just the outsides? Sort of analogous to constructing a wide brick wall with the interior filled with rubble?
• marcosdumay 10y ago
  The thing in that photo is quite porous. Also paper is very penetrable by water, so it wouldn't be too surprising. But, well, if it's that simple, just soaking cellulose acetate in NaOH should have a huge number of applications. Maybe even more interesting than this 3D printer. (Gotta try this at home later...)