Buy American Filament to support the development of new tools
Get the best filament tailored to lithophanes!
Affordable 3D printers known to be capable of quality lithophanes
The CR10S is recommended for lithophane lamps or ceiling fans because of its large build volume. The other models are recommended for night lights, framed, curved, and other smaller lithophanes.
Recommended high quality 3D printers
The MakerGear M2 is pretty small for printing lampshades, but the rest of the printers are large enough to print any type of lithophane you want. All of these printers have great reputations, and can more consistently print highest quality lithophanes than the printers in the affordable category. I would also recommend a Prusa (though they're not large enough for some lithophanes), but I can't affiliate link to them.