Product description

Prusament PETG Tungsten 75% 1 kg (NFC) is a top-tier technical filament developed by Prusa specifically for applications where effective shielding of ionizing radiation is necessary alongside the possibility of rapid part production on FDM/FFF 3D printers.

The base consists of high-quality PETG modified with a 75% proportion of tungsten powder (by weight). Tungsten (W) is an extremely dense metal (approx. 19 g/cm³), approximately 1.7× denser than lead, and is therefore ideal for X-ray and gamma radiation shielding. The combination of PETG + tungsten provides a non-reactive, hypoallergenic, and non-toxic material suitable for a range of medical and radiological applications.

Due to the very high density of the filament, you will achieve the required shielding effect in a relatively small volume of the printed part. At the same time, the material retains the typical advantages of PETG – good chemical resistance, low odor during printing, low warping, and easy post-processing.

This version includes an NFC chip integrated into the spool, which allows compatible Original Prusa printers to automatically load material information.

Main features and benefits

• 75% tungsten powder in PETG matrix – extremely high density, ideal for radiation shielding
• Excellent shielding properties for X-ray and gamma radiation
• Non-reactive, hypoallergenic, and non-toxic material – suitable for medical environments
• Good chemical resistance – suitable for radiopharmaceuticals and other more aggressive environments
• Low susceptibility to warping – stable printing even for larger parts
• Weak odor during printing – more comfortable operation in laboratories and workplaces
• Easy machining and sanding – very good post-processing, possibility of achieving a smooth surface
• High abrasivity – necessity of using a hardened steel or other durable nozzle (NOT brass)
• Fast printing – the filament allows for higher speeds than common technical materials with comparable density
• NFC spool – automatic material identification on supported Original Prusa printers

Recommended use

This filament is intended primarily for professional and industrial use:

• Shielding of radiopharmaceuticals (in holders, containers, and transport capsules)
• Testing and validation fixtures for X-ray and diagnostic radiological equipment
• Collimators for gamma cameras and other diagnostic devices
• Individually designed shielding covers and masks according to specific applications
• Special industrial and research applications, where the combination of high density, non-reactivity, and precise shape is essential

Notice: This filament is highly specialized and is not intended for hobby decorations – its purpose is primarily functional radiation shielding and related technical parts.

Printing recommendations

To achieve optimal properties and printer longevity, observe the following principles:

Suitable nozzle

• Always use a hardened, tempered, or otherwise highly durable nozzle (e.g., hardened steel, tungsten carbide, etc.)
• Tungsten powder is very abrasive and will wear out a brass nozzle quickly

Temperature settings (guideline)

• Nozzle temperature: typically within the range of common values for PETG (guided by manufacturer recommendations and Prusament PETG Tungsten profile)
• Heatbed temperature: same as standard PETG (usually 70–90 °C depending on surface and printer)

Print bed

• Best results: satin and textured PEI sheet (in line with recommendations for classic PETG)
• Smooth PEI sheet must be used with a separation layer (e.g., glue stick) to avoid surface damage

Cooling and printer settings

• Part cooling is generally rather limited (similar to PETG, sometimes even less)
• It is recommended to use official or verified Prusament PETG Tungsten 75% print profiles for compatible printers
• Before key jobs, it is advisable to print and evaluate a calibration object (e.g., test block for checking dimensions and infill homogeneity)

Safety and print quality

• Regularly check the nozzle condition – excessive wear can deteriorate print homogeneity and thus its shielding properties
• Keep in mind that any printing errors (underextrusion, voids, poor layer bonding) can significantly reduce shielding effectiveness

Technical parameters

• Material: PETG (PETG copolymer) filled with tungsten powder
• Filler: tungsten powder 75% by weight
• Filament diameter: 1.75 mm (tolerance ±0.03 mm)
• Spool weight: 1 kg net filament (without spool)
• Heat Resistance (HDT): approx. 94 °C
• Printing difficulty: low (similar to standard PETG, with emphasis on abrasivity)
• Abrasivity: high
• Odor during printing: weak
• Susceptibility to warping: low
• Post-processing: easy (dry and wet sanding, possibility of surface polishing)
• Elasticity: practically none (material is rigid)
• Possibility to polish surface: yes
• Compatibility: all common FDM/FFF 3D printers capable of printing PETG and equipped with a durable nozzle (especially Original Prusa printers recommended)
• NFC: integrated NFC chip in the spool (for compatible Original Prusa printers)

Who is Prusament PETG Tungsten 75% suitable for

• Hospitals, clinics, and radiological departments – in-house production of custom shielding covers, collimators, and fixtures
• Research institutes and universities – experimental shielding structures, test phantom parts, measurement equipment holders
• Industrial plants – custom production of parts for shielding radiation sources in NDT, industrial radiography, etc.
• Specialized 3D printing services – offering a unique material with high added value for customer projects

If you are looking for a maximally dense, safe, and repeatedly printable material for radiation shielding and technical applications, Prusament PETG Tungsten 75% is the ideal choice.

Key features:

• Highly specialized PETG filament filled with 75% tungsten powder
• Designed primarily for X-ray and gamma radiation shielding
• Non-reactive, hypoallergenic, and non-toxic material suitable for medical applications
• Excellent chemical resistance and low odor during printing
• Low susceptibility to warping, suitable even for larger functional parts
• High abrasivity – necessity of using a hardened nozzle
• Easy sanding and possibility of polishing print surfaces
• 1 kg spool with integrated NFC chip for Original Prusa printers