UL-certification for flame retardant
The flame retardant Prusament says that it is certified for use with:
"The UL certification applies only for printing with Original Prusa MK3S+, MK4, and XL and approved profiles in PrusaSlicer".
Are the CORE One and CORE One L going to be certified for it as well, and what kind of timeline are we looking at in that case?
RE: UL-certification for flame retardant
What the Current UL Certification Covers
Prusa’s flame-retardant Prusament (e.g., PETG V0) has an official UL certification for flammability (UL94 V-0). However, that certification is expressly limited to parts printed under specific conditions:
Printed on Original Prusa MK3S+, MK4, or XL
With a 0.4 mm nozzle and the exact approved profile in PrusaSlicer
Layer heights and sample geometries must follow the tested recipe
Only prints > 0.75 mm wall thickness qualify under the tested protocol Original Prusa 3D Printers+1
Because UL tests the entire printing process, including the printer itself and the way parts are made, the certificate only legally applies to that exact setup — not other machines or profiles, even if the material is identical.