This ink stick is produced so that the dispersion of carbon particles is constricted a little to create an overall quiet tone with brightness obtained by combining bright carbon and harmonizing brightness, and thus it features redness (warmth) and white light (grace). The seiboku (blue Ink Stick) has a quiet, light, and gentle tone, and the quiet bluish opaqueness with a tinge of red (warmth) has become the thickness and strength of the color of sumi where it expresses the harmony of the shin (the core, the stroke by the brush) and the nijimi (blurring around the edge of the stroke) so that the shin is expressed thick and the nijimi is expressed thin and gracefully. In three years (three winters), the composition of the ink stick will converge to make the separation of the shin and nijimi more distinctive and the tone of sumi more emphasized. After that, as the years go by, distinct properties and characteristics will develop. Manufactured in 1985.