To clarify the title, the findings are related to liquid resin-based methods vs. the much more common FDM method (usually extruded plastic filament) method.<p>The latter is usually ABS or PLA plastic, both of which are as theoretically safe as any other plastic in your home. PLA is a bioplastic and is actually compostable.<p>The resins, on the other hand, are pretty nasty and require gloves to work with. The safety data sheets are pretty serious and even mention that they are dangerous to aquatic life.