The Chartre cathedral is the world heritage in France.
It is said that stained glass in this cathedral are the most beautiful in the world and these glass still remain so that very rare.
A technology of glass proceed rapidly and getting brighter and brighter, on the other hand, a deep colors in the Chartre Cathedral is not many and many people says it is impossible to produce this kind of color now. Especially, a beauty of its blue is incomparable, hence a proper noun ''the Chartres Blue'' has been named.
Nib: 14k gold medium nib
Ink: cartridge or converter