This is a series of 100 carefully selected colors produced after analyzing the knowledge cultivated in "Ink Workshop" and the trend of the colors you choose from. Ink Workshop is an exclusive event of Sailor Fountain Pen, which started in March 2005. At specialty stationery shops nationwide, the ink blender will give you the color you prefer, and you can use a palette or shaker, and then put it in a bottle on the spot. Over 20,000 ink colors. The color number "123" is a fountain pen ink that changes the color of the pen after writing depending on the writing paper and looks like a different color with the ink shades.