An ink-jet printable and re-writable full color reflective mode display is developed by the position and concentration controlled deposition of a single, colorless, water base ink containing a reversible cross-linking agent, ammonium persulfate onto a transparent block copolymer photonic crystal film, as described in article number 1700084, by Edwin L. Thomas, Cheolmin Park and co-workers. The information is quickly written and erased over 50 times with resolution equivalent to that obtained with a commercial office ink jet printer.