This paper is a systematic investigation of inkjet photo dark humid storage permanence. In the paper, we describe a humid fastness mechanism, investigate indoor environmental conditions, describe our test method, discuss a possible lifetime prediction method, and propose a preliminary criterion for humid color shift failure to enable a prediction example.
Shilin Guo, Nils Miller, Dan Weeks, "Assessing Humid Permanence of Inkjet Photos" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP18), 2002, pp 319 - 325, https://doi.org/10.2352/ISSN.2169-4451.2002.18.1.art00079_1