Octopus Fluids Celestial Glitter Ink

Introducing the Celestial Glitter ink line from Octopus Fluids - the gamechanger for shimmer inks in fountain pens.

Controlled Flow Behavior

A key innovation lies in the ink’s flow behavior. Many shimmer inks are either too thin - leading to sedimentation of the glitter pigments - or too viscous, negatively affecting ink flow. The inks in the Celestial Collection deliberately combine both requirements. They exhibit thixotropic behavior (“ketchup effect”): At rest, the ink has a higher viscosity, keeping the pigments stably suspended. Under shear stress, such as during writing or shaking, the viscosity decreases and the ink becomes significantly more fluid.

This results in a clearly noticeable difference during use:

• consistent ink flow, even during extended writing sessions
• uniform shimmer effect without interruptions
• no need to shake or rotate the fountain pen while writing

Clean Writing Appearance - Even After Writing

Another major focus during development was the behavior of the ink on paper. Many shimmer inks lose their effect through abrasion or smudge during use. The Celestial shimmer inks were specifically designed to produce a permanently stable writing appearance. The shimmer pigments adhere reliably to the paper and remain in place even when touched or during frequent page turning. This makes the inks attractive not only for creative applications, but also for everyday use, such as in planners or notebooks.

Conscious Material Choice

For the shimmer pigments, synthetic mica is used. This mineral pigment offers consistent quality characteristics and provides a microplastic-free alternative to conventional plastic glitter. At the same time, it avoids the well-known ecological and ethical issues associated with natural mica.

Developed for Practical Use - Not Just for the Effect

Despite the technical complexity, practical usability remained the primary focus throughout development. The ink was designed to perform reliably in everyday use.

The Celestial Collection can therefore be used like a classic writing ink:

• reliable performance in fountain pens
• smooth ink flow without the typical deposit issues in the feed system
• easy cleaning with warm water

This transforms a category of ink that was previously often regarded as “purely decorative” into one that is genuinely suitable for daily use. 

The combination of stable pigment suspension, controlled flow behavior, and high practical usability clearly distinguishes these inks from the large number of existing products - setting a new benchmark for what shimmer inks in fountain pens can achieve.