Gravitas Quark Ultem

The Quark is a pocket fountain pen that reimagines compact convenience without sacrificing performance. Crafted from ULTEM resin, a high-performance polyetherimide (PEI) thermoplastic, this material is commonly used in the production of circuit boards, sterilisation of medical equipment, and, notably, aircraft components. Known for its exceptional strength, stiffness, and broad chemical resistance, ULTEM is a premium material reserved for highly demanding applications.

Designed to be the smallest pen of its kind, the Quark transforms into a full-sized writing instrument when posted. Its lightweight construction and ergonomically balanced section provide a comfortable and effortless writing experience.

With the new ACME double-start cap threads offering a smoother capping and posting action, increase wear resistance and improved seal, the Quark’s nib is revealed with just 0.6 turns, and the cap securely threads onto the back in only 2 turns when posted. 

Designed to be the smallest pen of its kind, the Quark transforms into a full-sized writing instrument when posted. Its lightweight construction and ergonomically balanced section provide a comfortable and effortless writing experience.

With double-start cap threads, the Quark’s nib is revealed with just 0.6 turns, and the cap securely threads onto the back in only 2 turns when posted. The section is precisely engineered from grade 5 material, featuring micro-machined grooves and a bead-blasted finish for optimal grip.

Fitted with a size 6 steel nib, compatible* with Jowo No. 6 threads and an ABS plastic feeder, the Quark offers a range of nib options.

*When swapping for a different nib unit you are sole responsible for checking the fitment of the new nib - we are not responsible for any damages that may occur from the use of non gravitas nibs/nib units.

This pen is also eye-dropper friendly, capable of holding up to 1.5ml of ink or accommodating a standard international ink cartridge.