Red and Blue Kitaboshi Editor's Pencil
This vermillion red and blue twin set is sometimes called an editor's pencil and exists in this specific colour combination across brands. The red end is usually used for corrections in written copy, and does not show up in xerography, while the blue pigment is used by editors to give instructions to the printer and does not show on photography or lithography - hence the name 'non-photo blue'. With the common spread of digital editorial layouts these pencils have gone into extinction mode.
Red and Blue pigment, clay, incense wood