Yes, I did cut all the veggies shown with this 3D printed knife, even the tomato. But it wasn't pretty. I designed this as a test to see if a 3D printed knife blade could cut anything. The answer is no. What it really does is sort of tear its way through food. But in reality, it doesn't do that much worse a job than most of the dull knives in your kitchen drawer. So in a pinch, if you really really need a kitchen knife, give it a try. Or just use it as a letter opener.

One if the first issues that will come up is that of food safety. But the way I see it, if you are so desperate as to use a plastic knife for your food prep, you are beyond worrying about food safety.

I printed the blade in PLA-CF. PLA is one of the harder plastics, and the carbon fiber adds some stiffness to the blade. Both the blade and handle print easily (I added a brim to the handle) with 0.2mm layers. I did sand down the edge with sandpaper to get it slightly sharper than the off-the-bed print. After printing, just put a drop or two of superglue into the hole in the handle and shove the blade tang in.