Photographic Activity Test
a standard procedure to check for potential chemical reactions between materials used to make enclosures and photographs stored in those enclosures
IPI 2019 Developed by IPI, this test predicts possible interactions between photographic images and the enclosures in which they are stored. The PAT is also used to test the components of enclosures, such as adhesives, inks, paints, labels, and tapes. The test involves incubating materials in temperature- and humidity-controlled chambers to simulate aging and takes from four to six weeks. After incubation and sample evaluation, a final report is provided. ¶ The PAT was designed to screen enclosures for possible chemical reactions with photographs. There are other tests that can screen for potential physical damage such as blocking and abrasion.