# 3D printing, how do you do it? **URL:** https://foil.zone/t/3d-printing-how-do-you-do-it/77 **Category:** Builds **Created:** [October 17, 2017, 6:05pm UTC](https://foil.zone/t/3d-printing-how-do-you-do-it/77 "2017-10-17T18:05:05Z") **Posts on this page:** 1 **Showing post:** 60
### Author: ![Flo](https://foil.zone/user_avatar/foil.zone/flo/32/608_2.png) [@Flo](https://foil.zone/u/Flo) #### Post date: [November 3, 2017, 9:05pm UTC](https://foil.zone/t/3d-printing-how-do-you-do-it/77/60 "2017-11-03T21:05:40Z")
I have not printed the parts on the forum here, but i have been printing PLA parts for the development of a jet water pump the last two years. PLA is neither air tight nor watertight with standard print settings. (But I’m printing with a cheap Pollin 3dp-100.) I had some success with clear laquer. I recently discovered how to get airtight parts. I printed these with Cura 2.6.2 (in short: 0.1mm layers, first layer 0.25, nozzle: 0.4mm, **5 contour lines and 16 top and bottom layers** , 105% flow (=overextrusion), 225°C for the first layers and 210°C after that, 60°C on diy heated bed) High infill settings were not useful in my experiments. Contour lines were the solution for me. I printed pipe connectors for hoses with these settings. I pressurized the parts with 5 bars (73psi) of airpressure and sprayed them with soap water. I have them in use with water now and don’t have any visible leaks. I would love to have more scientific results on this topic. Please let me know of any ideas. --- _[View the full topic](https://foil.zone/t/3d-printing-how-do-you-do-it/77)._