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.