Lennon Tool Bar Blue Sky () fountain pen ink is a dark blue color. Have you ever observed the night sky from a desolate place? The endless sky is ornamented by starlight from thousands of light-years away. You can see an unprecedented late-night party is going, and it brightens up the pitch-black curtain draped over the sky.

The Atmospheric Color Scheme () is inspired by atmospheric phenomena; the inks in this series are all waterproof pigmented inks.

Lennon Tool Bar was founded in 2014 at Tamsui, Taiwan. Initially they produced and promoted the art and craft of Indigo Dyeing, a business that flourished a century ago when Taiwan exported a considerable amount of doroai or the raw material of colorants used in Indigo Dyeing to the Japanese Empire. In recent years, Lennon Tool Bar has launched a series of fountain pen inks in order to popularize colors used in Indigo Dyeing and to present the enduring beauty of traditional workmanship.

• Volume: 35ml
• Bottle Material: Glass
• Color: Blue
• Waterproof