4 ms·

Is it possible to clean existing extruders that have been previously used with non-food-grade PLA to make them fit for food-grade use, or do you have to purchas

• OJFord 5y ago
  Unless you don't cook anything without your binder of US FDA datasheets and guidelines in hand, you don't worry about it. (And if you do that, you're already screaming 'not food safe' any time anybody mentions 3D printing anyway.) Aside from direct and prolonged contact, (you probably don't want to print and repeatedly use a spoon for example) the main somewhat legitimate concern is bacterial growth in all the tiny crevices that arise as a result of the printing process. Don't 3D print food storage jars and try to wash and re-use them? For a child's toy, there's not really a reason to worry about or treat it differently than anything you buy. Once it's been chucked on the floor, smeared through the dogs breakfast, and stuck in their mouth, it's pretty inconsequential that it happened to be 3D printed.