Prusa Launches Prusament PETG Ultraglow Green Glow-In-The-Dark Filament
Prusa Research has introduced a new filament in its Prusament range designed to shine very brightly in the dark. Called Prusament PETG Ultraglow Green, this glow-in-the-dark material is filled with a high amount of light-absorbing particles so that prints radiate a vivid colour after being exposed to light first.
Glow-in-the-dark filament isn’t new, but this version pushes what you might expect from the effect. Instead of faint glimmers that you see on novelty items, this filament charges with both natural and artificial light and then releases that energy as visible green luminescence for an extended period.
To achieve such strong glow, Prusa has used strontium aluminate, a modern phosphorescent additive that is non-toxic and non-radioactive. The filament is essentially clear PETG filled with as much of this glow-enhancing powder as is practical while keeping the material printable.
Because of how much additive is packed in, the filament is tougher on tooling than standard PETG. Users are advised to print with a hardened nozzle, as the abrasive nature of the material can wear out standard brass nozzles and other components more quickly. A larger nozzle diameter, such as 0.6 mm, is also recommended to help prevent clogs and ensure smooth extrusion.
Prusament PETG Ultraglow Green currently comes on 800 g spools and is priced at about 82.99 USD or 69.99 EUR, with additional colours expected to follow.
The PETG base gives this glow filament better temperature resistance and mechanical strength than many glow-in-the-dark PLA alternatives. That means it isn’t just fun for decorative and visual projects, but could be used in practical parts such as handles, indicators, visibility accents, or safety markers that benefit from being seen in low light.
This release highlights how materials in 3D printing continue to evolve. The combination of brightness, durability and functional use opens up new creative possibilities for makers, hobbyists and designers who want prints that stand out long after the lights go out.
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