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Mdavinci
(@mdavinci)
New Member
PETG Dishwasher safe?

Is the Prusa PETG dishwasher safe? Also food safe?

Posted : 09/08/2021 3:13 pm
bobstro
(@bobstro)
Illustrious Member
OK for dishwasher (probably) but not for food

The glass transition temp for PETG is typically around 85C/185F. A typical dishwasher cycles at around 60C/140F. So a PETG print will "probably" survive a wash cycle. Food safe is a complicated topic. PETG with no additives is generally considered food-safe, but most filaments have colors and other additives which are not. It really doesn't matter because FFF printing is inherently not food-safe. Any print will have grooves and crevices that can harbor bacteria and get gross rather quickly. You can coat PETG or other filament prints to make them safer. Food-safe also implies printing on an approved printer (e.g., no brass nozzles which typically contain lead).

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 09/08/2021 3:25 pm
adesir
(@adesir)
Reputable Member
RE: PETG Dishwasher safe?

 

Posted by: @mdavinci

Also food safe?

https://blog.prusaprinters.org/how-to-make-food-grade-3d-printed-models_40666/

Posted : 09/08/2021 4:38 pm
cwbullet
(@cwbullet)
Illustrious Member
food safe

Not all PETG is food-safe.  I general, I would not use 3d printing for contact with food.  

I do make items for the dishwasher and have used PETG and ASA.  Both survive the dishwasher.  The times I have made ate soda stream lid holders but none of the items make direct contact with food.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 10/08/2021 8:54 am
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