Polymaker PLA PRO Filament 1.75mm Light Red - High Strength 3D Printer Filament 1kg Spool | PolyLite PLA PRO Tough & Rigid Filament for 3D Printing | Ideal for Prototyping, DIY Projects & Cosplay Accessories

I have been printing for over 10 years and have used all the "best stuff" as that changed throughout the years. I have also spent a lot of time dialing in to different petgs which is a nightmare at times. I recently began printing some parts that needed superior strength and rigidity. This ruled out pla and petg, I considered asa or poly but those have challenges in getting a good print and need to be printed on polycarbonate plates, which requires me to use another printer besides my prusa, but I love my prusa ?, not that I don't love my other printers. Anyway, I ran across someone recommending this polymaker stuff and thought I would give it a go. I started with a prusa pla profile and made a couple tweaks and tried it out. My first print was gorgeous, beautiful layer lines and pretty easy to dial in first layer height and temp etc. Hotter temps tended to cause issues with corners curling on small squares, but dialing it back cured that, I settled on 200-210 and that works well. I had to adjust my extrusion flow rate for each color, they are not all the same so keep that in mind. Over extruding of course will cause issues with dimensional parts and this filament exaggerated it for some reason, but keep the temp reasonable and extrusion at the lower limit and you will get amazing parts. Here is where I had trouble, the filament is so strong and so cohesive that supports suddenly became a permanent piece of the part.It is hard to even cut with a knife, and sanding is not as effective as regular pla so the durability bites you in that regard. I had to take my xy spacing for supports from 50% to 75% and z spacing to .2mm. This eliminated my drooping lines (similar to what petg likes to do) and made the supports pull off often in one solid piece leaving a very clean part behind. With these little tweaks you will have great success with this filament and I swear it's near bulletproof. It has a soft feel in your hand but great rigidity and feels almost like an injection molded part, not ceramic like some pla. If I had to quantify it I would say it's 80% pla and 20% petg, not that it really is, but that's what it performs like. I highly recommend it and I don't think I'll ever buy anything else, bubbye hatchbox!!!Ps, I love the idea of a recyclable spool, but HATE IT in execution, if I could I would rewind it onto an old plastic spool. The spool gets bent and drags, it leaves cardboard shreds in the spool holder, it has a lot more resistance to rotating than a plastic one so I feel a poorly made or tuned extruder may slip while feeding. That is one thing that bothers me, but I guess I'll just have to deal with it cuz I love the filament.