Glow-in-the-dark PLA prints at about 215 °C with a 60 °C bed and 100% part cooling. Usable range 200–230 °C nozzle, 55–65 °C bed. Abrasive — needs a hardened nozzle.
Glow PLAGID PLALuminous PLA
Starting settings
Nozzle
200–230 °C (start 215)
Bed
55–65 °C (start 60)
Part fan
80–100% (start 100%)
Wall speed
25–45 mm/s
Max volumetric flow
9 mm³/s
Shrinkage
0.3%
Softens at
60 °C
Enclosure
Not needed
Nozzle size
0.4 mm or larger — 0.6 mm recommended
Nozzle material
Hardened steel required — this is abrasive
Drying
45 °C for 4 h
Speed
Slower than plain PLA, 25–45 mm/s. Heavy crystal loading makes flow inconsistent at pace, and inconsistent flow shows up as patchy glow as well as patchy walls.
Bed surface
Smooth or textured PEI at 60 °C.
Nozzle
HARDENED STEEL at 0.6 mm. The glow crystals are both large and harder than your nozzle — a 0.4 mm brass nozzle is a way to destroy a nozzle and clog it at the same time.
What bites people
THE MOST ABRASIVE COMMON FILAMENT. The strontium aluminate crystals that make it glow are harder than the steel in your nozzle. A brass nozzle can measurably wear out in 200 g — a quarter of one spool.
Hardened steel is not optional here, and a 0.6 mm nozzle handles the large crystals far better.
Glow brightness depends on wall thickness. Thin walls hold almost no glow — design for 2 mm or more if the effect matters.
Charge it under UV or bright light. Ordinary room light gives a weak, short glow.
Safety
Nozzle runs above 200 °C.
Severely abrasive — a worn nozzle changes your extrusion width and quietly ruins calibration.