EasyThreed TPU Glow-in-the-Dark 3D Printer Filament – 1.75mm Luminous

The Problem with Ordinary 3D Prints

Most 3D printed objects have a fundamental limitation that no amount of post-processing can fully address: they are static. They look the same in daylight as they do in darkness. They have no presence beyond their physical form. For makers, designers, and creators who want their prints to do more — to glow, to surprise, to create an effect that standard filaments simply cannot achieve — ordinary PLA and ABS are not enough.

The EasyThreed TPU Glow-in-the-Dark Filament solves this problem by combining the flexibility and durability of TPU with a luminous green phosphorescent compound that charges in ambient light and glows visibly in darkness. The result is a filament that produces prints with a genuine visual effect — functional objects that become something more when the lights go off, decorative pieces that have a presence in darkness as well as light, and prototypes that can be tested in low-light conditions as well as standard environments.

Why TPU Is the Right Base Material for Luminous Filament

Glow-in-the-dark effects are available in multiple filament types, but TPU is the optimal base material for most applications. Unlike PLA, which is rigid and brittle, TPU is a flexible thermoplastic elastomer that can be bent, compressed, and stretched without cracking or breaking. This flexibility makes TPU prints genuinely functional in ways that rigid filaments cannot match — phone cases that absorb impact, gaskets that seal under compression, wearable items that conform to the body, and any application where the print needs to flex rather than fracture.

The 98A Shore hardness rating of this filament places it in the semi-flexible range — firm enough to hold its shape and maintain dimensional accuracy in printed parts, but flexible enough to absorb impact and resist the cracking that affects rigid filaments under stress. This balance of firmness and flexibility makes it suitable for a wider range of applications than either fully rigid or fully soft TPU formulations.

Precision Diameter for Consistent Extrusion

The ±0.05mm diameter tolerance of this filament is a critical specification for consistent print quality. Filament with inconsistent diameter causes variable extrusion — the printer deposits more material when the filament is thicker and less when it is thinner, resulting in prints with visible layer inconsistencies, weak points, and surface defects. The tight tolerance of this filament ensures that the extrusion rate remains consistent throughout the spool, producing prints with uniform layer adhesion and surface quality from the first metre to the last.

The 1.75mm diameter is compatible with the vast majority of FDM 3D printers on the market, including all major consumer and prosumer machines. No printer modifications are required — simply load the filament and adjust your slicer settings for TPU.

Non-Toxic Formula for Safe Indoor Use

The non-toxic formulation of this filament makes it safe for use in home and office environments without specialist ventilation. The luminous compound is a phosphorescent material that charges passively from ambient light — no UV lamp or special charging equipment is required. Simply expose the printed object to light and it will glow in darkness for an extended period.

Available in Multiple Spool Sizes

Available in 250g, 500g, and 1kg spool sizes to suit different project scales and usage patterns. The 250g spool is ideal for testing the filament with a new printer or for smaller projects. The 500g spool provides a practical mid-range option for regular users. The 1kg spool offers the best value per gram for high-volume users and those who want to minimise spool changes during long prints.

Specifications

Brand: EasyThreed | Material: TPU | Diameter: 1.75mm | Diameter Tolerance: ±0.05mm | Hardness: 98A Shore | Colour: Luminous Green (Glow-in-the-Dark) | Available Weights: 250g, 500g, 1kg | Non-Toxic: Yes | Origin: Mainland China