We studied the fading behavior of bare, ink-jet printed samples hung indoors, from the point of view of gasfastness (ozone-fastness). Bare samples were hung in a home environment for 1 year. The samples showed an average fading tendency similar to that of a 15-ppm·h ozone accelerated test at 24°C 60% RH. Taking into account wide divergences in home environment and climate, we set 40 ppm·h as the one-year equivalent level of fading, and we studied the influence of temperature, relative humidity and ozone concentration on the ozone accelerated test.
Kazuhiko Kitamura, Yasuhiro Oki, Hidemasa Kanada, Hiroko Hayashi, "A Study of Fading Property Indoors Without Glass Frame from an Ozone Accelerated Test" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP19), 2003, pp 415 - 419, https://doi.org/10.2352/ISSN.2169-4451.2003.19.1.art00100_1