There are two plastics most commonly used in home 3D plastic extrusion printers: ABS and PLA. When you’re printing, you definitely notice them – or your nose does.
PLA, also known as polylactic acid or polylactide, has a rather pleasant aroma when heated, sometimes described as “waffles” or “honey.” Along with its lack of warping, the aroma makes for a very satisfactory 3D printing experience.
ABS, also known as acrylonitrile butadiene styrene, has a very different printing experience, particularly when your 3D printer is poorly ventilated. Its smell is very sharp and sometimes can burn your throat if you breathe too much of it.
Read More at Fabbaloo