THE VARIABLE COLOR PEN

摘要

The present invention relates to a writing instrument that has the function of embodying a desired color by containing ink of magenta, cyan, yellow and white, which are subtractive primary colors, in a single writing instrument and adjusting the ink combination ratio of each of the colors and the function of writing or drawing a picture with a desired thickness by adjusting the amount of combined ink. The present invention enables all colors to be expressed using a single writing instrument.