Polypropylene test bottle

I wanted to experiment with printing polypropylene (PP), mainly because of several upcoming projects where its properties could be useful. While there is quite a lot of general information available about PP filaments, I struggled to find complete and reliable print settings for specific manufacturers. The default PrusaSlicer profile also felt somewhat inconsistent, so I decided to create my own test models to evaluate cooling, extrusion, speed, and overall print behavior.

For testing, I used Verbatim PP and Sunlu PP, both of which provide very limited official guidance on print settings. I designed and printed several small objects (including these vase-like forms) to compare their performance.

The differences between the two materials were quite noticeable:

Verbatim PP is significantly more flexible, but also more difficult to work with. It tends to jam the extruder, so careful handling during loading (avoid automatic retraction) and unloading is essential. When unloading, it ofte