<p>I am working with a bunch of Makerbot Replicator+ printers and one Z18 in a classroom. I would like my students to be able to print cups and stuff to drink from if they want. I know I need a food-safe material AND a food safe nozzle if it can be managed.</p>
<p>So, I wanted to check the following:</p>
<ol>
<li><p>Is there a material data sheet for the PLA filament that Makerbots use? I am told you need to check for each color, so the general one doesn't seem to be what I need. If anyone knows where to find it, please let me know.</p>
</li>
<li><p>I am told stainless steel nozzles are best. I saw several sold on amazon and the like that will supposedly fit the Smart Extruders. Recs on which I should use (if any) are welcome. Especially as the nozzle width will differ, the stock nozzle I think is 0.4mm? I assume I will need to adjust the settings on the printer as well anyway if I swap out the stock nozzle.</p>
</li>
<li><p>Another procedure my research yielded was that I would probably want to coat the 3D prints in resin. It seems there are several food-safe brands. Would such resins stand up to acidic liquids like orange juice and the like? What about alcohol? I know they won't work with coffee or something because PLA melts as such a low temperature. Recommendations are welcome here, and whether I should paint on or dip the 3D print?</p>
</li>
</ol>
<p>3a. Even if the PLA isn't itself officially food safe would just coating it in resin solve that problem?</p>
<p>Any assistance here is much appreciated.</p>

[{'answer_id': 19857, 'author': 'Kilisi', 'author_id': 31811, 'author_profile': 'https://3dprinting.stackexchange.com/users/31811', 'pm_score': 1, 'selected': False, 'text': "<p>A better alternative would be PETG, it's food safe on it's own and has more heat tolerance than PLA. It prints with much the same ease as PLA.</p>\n<p>I'm not familiar with your particular printer, but nozzles are standard sizes. Swapping a brass nozzle for a stainless steel one doesn't need anything extra done. They both work the same, just the steel nozzle is harder wearing.</p>\n"}, {'answer_id': 19858, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 2, 'selected': False, 'text': '<p>FDM itself is not particularly food-safe, coating the print may prevent bacteria to settle in crevices. Furthermore, the filament should be able to withstand high temperatures for extended periods of time in case you want to clean the printed cups to kill bacteria.</p>\n<p>An overview of food-safe filaments is given by <a href="https://all3dp.com/2/food-safe-3d-printer-filament-best-brands/" rel="nofollow noreferrer">All3DP</a>. Without going into details, this overview recommends the use of certain TPU, nylon, high-temperature resistant co-polyester, PETG and ABS filaments. All these filaments are located at the higher-end temperature region of the filament pool.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/19855', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/31967/']