Fillamentum is a Czech Republic-based company specializing in the manufacturing of high-quality 3D printing filaments. Their PLA filament, which they call PLA Extrafill. The filament is made of natural ingredients and can be biodegraded by industrial composting. PLA Extrafill is also safe for food contact applications.
Fillamentum PLA Extrafill is more expensive than many other companies PLA filaments, costing approximately $26 (USD) for 750 grams of filament compared to approximately $28 (USD) for 1kg of CCTREE filament.
Extrafill is available in diameters of 1.75 mm and 2.85 mm (with a diameter tolerance of +-0.05mm), and in a wide variety of colors, I used “Traffic Black” for this review.
As with all PLA-based filaments, it has a recommended printing temperature of 190-210°C.
I experienced a great deal of difficulty successfully printing this PLA, far more than any other PLA I have used in the past. The PLA Extrafill kept clogging the 3D printer hot end with every single print. I tried various setting profiles in Cura. However, the result was always a clogged hot end. This was the case until I dropped the default retraction distance in CURA by a third, and this rectified the clogging hot end issue and allowed me to complete a few successful prints. However, reducing the retraction distance did result in a great deal of striking, more than any other PLA I have ever used. I did manage to reduce this by changing the travel and retraction speeds and reducing the print temperature to 180°C.
Here are some photos of my attempts to print the 3DBenchy model. They illustrate nicely the difficulties encountered.
As I kept refining the settings, I managed to get better results and eliminated more of the print issues I experienced.
Here are some pictures of a Judge Dredd bust with only slight drooping issues around the helmet.
I also printed a Desk organizer to store my 3D print finishing tools.
I finally managed to refine my setting to the point where I could print miniatures with a great level of detail.
If anyone is interested in the Cure settings used to print these miniatures, you can download my Cura settings profile here. This was configured on Cura 4.8.0.
Fillamentum PLA Extrafill is capable of producing excellent results if you put in the work. However, I do feel that given the difficulties experienced with the filament and the results being no better than other less expensive filaments, for example, eSun PLA+, I find Fillamentum PLA Extrafill extremely difficult to recommend.
Killer Robotics 
Thanks for that excellent and detailed review! I have tried different filaments for my prints too, and my experience with different brands are very similar: it takes work to get configure a new brand, and it depends on the printer too. While I tried to switch filament in my ‘early days of 3D printing’, I stick to one brand and very few colors (black and white) to avoid the extra work. I have found that aging of the filament and moisture has an impact too: having an extra climate box for filament was not something I wanted to do.
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