In photography, white is the color that has been exposed to light for the longest time. Stronger light means more accumulation of time. The inks used for color reproduction in offset printing and photography are the CMYK(cyan, magenta, yellow, key/black), and in output, white indicates that the color is not applied and just emptied. Ki chose

the black print panel to reveal the easy fact that the brightest light is shown as white in printing and white color is actually not printed. Shining stars, photographed with the long-time exposure, were printed on the black panel. Since the printed image has little difference in brightness, the image can be recognized through the reflection of light, and it show a negative film effect depending on the viewing angle. The artist made the black print panel with Korean paper Hanji soaked with ink to represent the non-printed part(light) matt, in contrast to the glossy ink of the printed part. In “Hubble Ultra Deep Field”, part of the “Light is not printed” series, is an image of the air taken with Hubble Space Telescope for ten days. In the image, the countless number of stars and galaxies reveal their beings through light.