Executive Summary: Encountering an ink "air lock" or slow flow? Don't worry, it’s just physics. Your pen is functioning as intended. You can settle the ink instantly using the agitation or pre-wetting techniques shown in the video below.

To get your ink moving immediately, here are three simple ways:

Quick Solutions for a Smooth Fill

• The Pre-Wet Method: For the most seamless experience, flush the barrel with water before inking. This creates a microscopic film that helps the ink glide past the reservoir walls.

• The Eyedropper Pump: While filling, use your eyedropper to gently "pump" the ink at the opening. This small amount of agitation breaks the surface tension, allowing the ink to settle.

• The Gentle Flick: If ink is caught in the narrow section tube, a quick, gentle flick of the wrist will break the air lock and move the ink toward the feed.

For the most efficient fill, we suggest using the pre-wetting method shown here. Watch how a simple rinse allows the ink to glide effortlessly into the reservoir.

Why Does This Happen? (The Science)

Understanding the "why" behind your pen’s behavior can help you get the most out of your writing experience. This phenomenon is a result of two intentional design choices:

1. Hydrophobic Material Science

We use a specialized resin for our barrels that is hydrophobic (water-repelling). This is a premium feature designed to prevent ink from "clinging" or staining the walls, ensuring your reservoir remains crystal clear even after years of use. Because the material repels liquid, the ink doesn’t naturally "wet" the surface, which can sometimes cause it to bead up at the entrance.

2. Reservoir Architecture

The internal geometry can influence fluid behavior. In models with more intricate or narrower internal structure, such as the Triple Twist, the effects of surface tension are naturally more pronounced. In these compact spaces, the "skin" of the ink can be strong enough to resist gravity until the tension is manually broken.