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Does Moisture Effects 3D Printing? Kinda?

Steven Mosbrucker


I have got some preliminary findings.

My findings were that moisture effects 3d printing: Kinda/Not Really


  • filament was removed from water pitcher after 1 week. Filament was found to be very brittle and a lot of it snapped off after removing. however once the water on the surface flashed off it was ok to handle and even feed through my bowden Kossel.
  • filament was put into a toaster oven (surprisingly efficient toaster oven) and baked for about 2-3 hours at 150F. the filament that was added was room environment filament that turned out to be 2.3%+ by weight moisture. (which is pretty high i try to extrude filament at .08%).
  • all filaments were extruded at about 50mm/s at 217C the part was the 3d benchy at all original scale with 15% infill and no supports.


  • From my 3 3d prints comparing side by side you can see that there is a big difference between the water logged and the "baked" filament.
  • however i had another print (4th print) that was the same file that i just changed some settings such as increasing the print temp i got the same quality as the "baked" filament".

so my preliminary findings that as long as you don't store your filament submerged in water you should be able to print fine and baking filament to remove moisture is not worth the power.


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So to review my preliminary findings sofar it seems that moisture does not effect 3d printing as much as i would have thought. Even at worse case senario where your filament is literally stored in water as the filament dries the effects of bubbling subside. causing very similar effects to the house 3d print.

Yes the baked does show superior surface finish to the house environment filament. However just upping the extrusion temperature 7 degrees Celsius will give the same if not superior surface finish without the need of 4 hours of baking the filament. 

I am going to roll into the next step of research where i am going to test about 4 - 5 different moisture content filament. I will do that by again water logging a large quantity of filament then force dry the filament for different times in the oven while following the change in weight in order to determine the current moisture content at each oven duration. then grading the filament from worst to best. blog post on full details coming soon.

check out the images bellow for high res versions.







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