By using Canon's newest projector LV-7545, the images' colors were faithfully reproduced on the screens(*1).
Taking advantage of the beautiful blue hue (a default color at starting time), the deep-blue screen was projected for several seconds between works(*2).
Also, the shutter(*3) was attached so that the projected light could be shielded at the time of blackout, thereby creating an several-second interval of perfect darkness between works.
*1 *2 *3
projector:  Canon LV-7545 X 4
3700 ANSI lm / XGA(1024*768)
shutter:  Shutter made specially for the exhibition X 4
Controlled by RS-232C
Speed until operation is stabilized: 0.5 second / 1 action
1 second / from closed to closed action