Prusament PETG Ultramarine Blue Transparent 1.75mm 1kg Spool - Precise

In this review the focus is on Prusament PETG Ultramarine Blue, a 1.75mm, 1kg spool aimed at makers and small shops that need reliable, mechanically consistent filament. The bottom line: this filament is for users who value tight diameter control and repeatable color more than bargain pricing. Prusament's in-house production and the ability to scan a spool QR code to inspect measured parameters make this filament stand out for anyone who repeatedly prints functional parts and needs predictable results.

Key Features

• In-house manufacturing: Produced by Prusa Polymers, the filament is made under the same company group as the printer brand, so production oversight is direct and consistent for better reliability.
• Diameter precision: The filament is manufactured to a diameter tolerance of +/- 0.02mm, which reduces layer variation and helps avoid nozzle clogs or under/over extrusion adjustments.
• Color consistency: Ultramarine Blue transparent formulation is made with controlled color mixing so multi-spool projects keep consistent translucency and hue.
• Traceable spool data: Each spool carries a QR code that links to measured parameters online, enabling users to verify spool-specific tests before printing.
• Manufacturing QA: The process includes checks for string diameter, color consistency, and mechanical properties so each spool meets the stated tolerances.

Who It's For

This filament is best for hobbyists upgrading from commodity filament, prosumers printing functional parts, and small production runs where material repeatability matters. The 0.02mm precision and spool-level test data will benefit users who tune slicer settings and rely on consistent extrusion for dimensional parts or assemblies.

It is less suitable for buyers seeking the cheapest bulk filament or those who need specialized engineering PETG grades with additives not mentioned here. If bed adhesion has been a persistent issue in past prints, expect to spend time dialing in first-layer settings since user reports on adhesion are mixed.

Pros & Cons

Pros

• High manufacturing precision leads to consistent extrusion and fewer surprises between spools.
• Traceable spool data via QR code provides transparency and confidence in material specs.
• Premium production oversight and color control result in reliable translucent Ultramarine Blue prints.

Cons

• Some users report mixed bed adhesion results, so first-layer tuning may be required for best results.
• Not the lowest-cost option compared with commodity filament alternatives.

Specifications

Our Verdict

Prusament PETG Ultramarine Blue is a smart choice for users who prioritize predictable extrusion and consistent color over the lowest price. The spool-level data and 0.02mm tolerance make it especially valuable for functional prints and repeatable results, though newcomers should expect to tune bed adhesion. Overall it is good value for those who need reliability and transparency from their filament supplier.

Frequently Asked Questions

Can I check the measured parameters for my exact spool?
Yes. Scan the QR code on the spool to view spool-specific diameter and test data online.

What tolerances can I expect from this PETG?
The filament is manufactured to a diameter tolerance of +/- 0.02mm for consistent extrusion.

Is this filament good for functional parts?
Yes. The controlled production and testing make it suitable for strong, functional prints when print settings are tuned.