Prusa CORE One+ Kit: Build Your Own 3D Printer
United StatesUnited StatesPrusament is a premium-grade material made by the same people who build the printers. Every spool is manufactured in-house with consistent color and ±0.02 mm precision. You can verify it yourself, down to the last meter.
Every Prusament color is formulated and locked to a documented spectroscopic recipe. We test every batch against the standard before it ships. The result: if you run out mid-project and order a second spool, the colors will match perfectly.
Some manufacturers claim similar numbers, but claims without proof are just marketing. We measure and record diameter and ovality continuously across the full length of every spool, and we publish the actual data.
Every Prusament spool comes with the actual measured data from manufacturing: diameter readings along the entire length, weight, and ovality. We're the only filament manufacturer in the world that does this.
Our PLA filament is wound under controlled tension on precision machines. Every spool goes through a final inspection before shipping. The result is a spool that feeds smoothly from start to finish. Also, it looks great every time.
Prusament is manufactured in our facilities in the Czech Republic (Europe) and Delaware (United States). That means faster shipping, lower import duties where applicable, and a supply chain under our full control.
There's no third-party manufacturer who can quietly change a raw material supplier. No surprise batch failures from a factory you've never visited.
We used the maximum amount of glowing powder we could achieve while maintaining reliable printability and delivering exceptionally bright luminescence. We felt like there was no strong reason to make another mediocre glow-in-the-dark PLA filament, as the market already has plenty. Instead, we did what we do best: we took it up to eleven.
Prusament PETG Ultraglow can be charged by exposing it to both UV (most effective) and visible light sources. When charged, the filament glows strongly for several minutes, then the glow intensity gradually decreases. In total darkness, a weak glow can be visible even after 6-8 hours after charging.
We ordered other branded glowing filaments and put them all to the test. We've kept the other brands anonymous, as the results speak for themselves. Prusament PETG Ultraglow shines by far the brightest when compared to common glow-in-the-dark PLA.
Prusament Ultraglow is filled with strontium aluminate, which is a safe alternative to historically used Phosphorus. It's not toxic and neither radioactive.
Read more in our announcement article.
Starting October 2025, all Prusament filaments ship on a redesigned spool with a fully rewritable NFC tag powered by the OpenPrintTag standard.
The OpenPrintTag attached to your Prusament spool contains essential data about the material and can be read with the Prusa mobile app. It works entirely offline, it is free to extend, and open for anyone to build upon.
Before printing, learn about print surface preparation in our dedicated article and material table.
We deliberately chose PETG as the base polymer for a reason: it's stronger than commonly used PLA and resists higher temperatures, making it suitable for functional parts. And you can take it further with the XL and other multimaterial solutions. Print functional models in standard PETG and add glowing accents to highlight specific components - switches, handles, indicators, or any part that needs visibility in low light.
Everything you need to know before printing
You can find all featured models at printables.com
glowing Emergency Exit Sign by The Kit Card Guy, Skirting Arrow by SteveW91 and Diving arrow by Jakub Kočí
Nordic Knurled EDC Capsule by DFV Tech and Mix of models by Prusa
Glow in the dark doorlock finder by Ronny
