The thicker the shell, the stronger your object will be. However, complicated designs don't need thick shells. For cookie cutters, the default . 8 mm should work just fine.
We print our cutters on a 3D printer, using a high quality food safe PLA. The cutters we make are to be washed by hand only in warm soapy water and are not dishwasher safe. Putting the cutters in a dishwasher could melt, warp or otherwise damage the PLA.
For the most part, 3D printed cookie cutters are food safe because they are not in contact with the cookie dough for very long and because the cookie is baked after it is cut, which kills any bacteria.
Cookie cutters are a great way to bake, whether you use them to make cookies of your favorite animal or character, or just to get that perfect star shape every time! Opening up a whole new world of cookie cutters is 3D printing, because the sky's the limit in terms of what shapes you can design, customize, and print.
I've recently found printing my cutters on draft/standard results in a good cookie cutter quickly. I've been printing 3-4in. cutters on draft at about 20-38 minutes. High quality I've seen go as long as almost 2 hours for a large cutter.. . . . .364011236463!]0000000000000009783314147205!]
