rkm rdt
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That makes sense. I don’t see the advantage unless they are intending to use it for c&b models .Its simple.... The smaller the nozzle, the increase in detail. Given a defined object to print, let's say a pencil. The software calculates say 500 build layers with a 0.4 nozzle to complete.
When you switch to a 0.2 nozzle and change in the printer setting, it will calculate 1000 layers to build the same size pencil. Therefore it will take twice as long to print. However the benefit is the details will be smoother because those layer lines will be cut in half.
You will just have to determine if it's beneficial or not for the extra print time.
Whether you want VHS quality or DVD quality. At that point you're going to find the ceiling for FDM printing. You'll have to have a resin printer if you want that HD/4k look.
As far as printing crowns, the nozzle will add no further capability. And to my knowledge there is no thermoplastic that could be used to make crowns. It is possible you could do something like a "snap on smile" if they made an appropriate filament. However most thermoplastics that can go through that hot end and also have sufficient pressure to extrude, probably would be unbondable with cement.