Notus – Alumina Beads with 8% Potassium Permanganate

Alumina beads infused with 8% potassium permanganate. Uses the same active oxidiser found in Nevermore Scorch-style media, but on an activated alumina substrate. Nevermore-approved by Ondsk4, creator of the Nevermore project. Made in Canada.

• Optimal Quantity : Each vacuum-sealed 2.15l (~2.3kg) bag is enough to completely fill a Nevermore StealthMax V1
• Customizable Use: Can be mixed 50/50 with activated carbon to extend lifespan while maintaining moderate chemical filtration.
• Shipped in a resealable vacuum bag to extend shelf life and allow partial use.

Reccomended mixing rations:

• Below 35°C: 90% Carbon / 10% Notus 
• 40°C ± 5°C: 75% Carbon / 25% Notus
• 50°C ± 5°C: 50% Carbon / 50% Notus
• 60°C ± 5°C: 25% Carbon / 75% Notus
• Above 65°C: 100% Notus

Typical properties :

• H²S Capacity (minimum): 0.10 g H²S/cc
• Moisture: 22 wt%
• Compaction (minimum): 2.7 kg (6 lb.)
• Particle Diameter: 3.2 mm (1/8 in.)
• Apparent Density: 0.88 g/cc (55 lb./ft³)
• Pressure Drop @ 50 fpm (0.25 m/s): 1.0 in. of water/ft. of bed

Notus is better suited than carbon-only media for hotter chambers because its KMnO₄ chemistry does not rely solely on physical adsorption and because activated charcoal loose almost all holding capacity at these temperature. Performance still depends on airflow, media loading, humidity, chamber conditions and print time.

Why activated alumina is a “match in heaven” for 3D-printing:
• activated alumina is hygroscopic. In a recirculating printer chamber, the same enclosed air repeatedly passes through the media, so the alumina has more opportunity to adsorb some moisture around the filter bed. This may support the KMnO₄ chemistry, but it is not a replacement for properly drying filament before printing.
• The porous alumina substrate helps bring gas molecules into contact with the KMnO₄ (the purple stuff…), allowing adsorption and chemical oxidation to work together.