21-10-2019 Sunlu PLA Black

An online seller decided he wanted to give me an opportunity to test and review Sunlu PLA. A link to his American store can be found here and to his European site here.

The brand Sunlu, has a nice site of its own, where you can see their products and some additional information.

This review is about black PLA. Some basic info: nozzle temp: 190-220°C, bed temp: 60-80°C (a heated bed is not required for PLA), fabrication tolerance: 0.02 mm. This is only the 2nd manufacturer, on the moment I was writing this review, who used such tight tolerance for filaments. The filament is available in 1.75 mm, but also 2.85 en 3.00 . There is 1 kg of filament on a spool.


A brown (a bit boring, but this is not affecting the print quality) box with black printing on it, a sticker that mentions what the content of the box is, and a some basic settings on the back.

The spool is properly sealed in a plastic bag, which contains some silicate to prevent moisture being picked up by the filament. A negative point (but this is personally): I don’t see any markings on the side of the spool that state how much filament is left over. More and more manufacturers do put these markers on their spools. But, then there are the big windows in the spool, that let you guess what’s left.

The windings on the spool look fantastic. The measured deviation (tolerance) was indeed in the 0.02 mm range that Sunlu promessed (measured on 10 spots over a distance of 5 meters).

As always, my first test is a temperature tower. Started from my base profile in Prusaslicer, 0.2 mm layers and 55°C on the bed. I’ve got the best results about 205°C.

Test n°2: my calibration cube. 0.2 mm layers, NO supports and 5% infill. That was giving me a very nice result. Stringing was about none. Smooth lines, even the “detail text” on the top was readable (usually this is not the case), sharp edges on the boundaries of the inner holes, a very nice result of the bottom, and it’s surprisingly how good the hoizontal layers without support are printing (middle). No warping at all ( this is usually showing in this test, when the filament is sensitive for cooling).

Always difficult: my detail text.

Next up: one of the owls. 0.15 mm layers, no supports. Again, we get an awesome result.

So far for my standard tests. Let’s start some random ones.

First, a beam from a train track. 0.2mm, no brim, 5% infill. Absolutely PERFECT !

Something that looked to be fun to print because of the texture. This is an arm of an ancient anchor.This needed to be printed on 150 micron, no infill, but with a raft and supports.

After removal of the printed object, the raft and supports kept hanging on the bed. It was that easy to separate the supports from the print.

What is the period of the year on the date I’m writing this? Right, Halloween. 0.15 mm layers, no infill, except for the top 2 cm. That was for supporting the top layers that are reasonable horizontal.


  • Good, but a bit boring, box, which includes some silicate in the sealed bag to avoid moisture being picked up by the filament.
  • I was missing some markings on the sides of the spools to estimate leftovers.
  • No warping.
  • Stringing is about zero when using the correct temperature.
  • The print “sticks” good to my bed while printing. Sometimes a little “too good”.
  • The end result makes you feel very satisfied.

Would I recommend this PLA? I sure do. A probably will be using it myself, when my stash of PLA filament is cleaned out.

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