Hello, I've been trying to 3D print living hinges for a few different projects for a while and was wondering if anyone had any tips. Living hinges are used all around us. The best example is probably on a ketchup lid. Basically the entire lid is one single piece but the top and bottom are joined by a thin piece of plastic (or other materials in different applications) that flexes and allows the parts to open and close. These are used really commonly in moulding but I've personally struggled to make good versions via 3D printing. This is mainly due to the materials used - 3D printing generally uses plastic that's a lot more brittle - but also down to the process used. The method of printing layers (mostly used in FDM) tends to makes flexible parts quite weak 'across the grain'. I've found some blog posts online but was wondering if anyone has any specific tips from their own real-world experiences? Specifically - * What's the best material to use? I typically go for something like a Nylon, or a 'Strong and Flexible Plastic' * The best process to use - FDM, SLA, SLS etc? * Any tips on the actual geometry. I tend to use this image as a starting point - but obviously this isn't optimised for printing. It's tempting to make the parts thicker... but I suppose that this actually just makes them less flexible and more prone to breakage. Any tips or idea would be gratefully received. Thanks!