pencil produced with 2B graphite mine. It is softer and its line is darker and easier to erase. Printed with the Ut queant laxis ou Hymnus in Ioannem of Guido d’Arezzo. The use of Ut Queant Laxis to name the tones is usually attributed to Guido d’ Arezzo in the eleventh century, who proposed a name the tones of notes Pencil with the graphite mine suitable for musicians./ Accessoire / Accessoire