Looks like a filament runout sensor, and there is a tiny tiny little bit of extra filament sticking out the top right. If the print had needed a little bit more filament, it would have pulled through the sensor and the machine would have reported it had run out of filament and paused the print.
Essentially flying really fucking close to the sun and somehow making it by the skin of their teeth.










Dental stuff has been tested to ensure they’re biocompatible, but we still warn team members not to touch unset product even with gloved hands too much. Dentists who have a habit of wiping excess resin on the back of their gloved hands have developed contact dermatitis. Once fully cured, it is unreactive.
Fingernails are pretty inert, so it’s not as important. They’re still tested to ensure they’re not poisonous if ingested, as folks have a tendency to bite their nails.
Exposure time, vapours, biocompatibility, volume - all of these add up to make 3d resin printing pretty hazardous. Even dental 3d printing resins require this level of safe handling, until they’re fully cured.