n.a process that reduces the amount of space necessary to store or transmit data, with or without loss of informationBailey 2006, 175Data compression, however, often affects the nature and format of the archival record, particularly if the compression is a “lossy” rather than a “lossless” process.Cocciolo 2017, 15In the digital library and archive literature, uncompressed has become synonymous with archival or master, and compression with access.Anderson et al. 2021, 258Staff found practical technical recommendations relating to image resolution and file compression as well as other observations on the scanning process such as flattening drawings, encapsulation of fragile materials, and the use of roller scanners versus flatbed scanners.Fallon, Leventhal, and Vowell 2022, 67One must also bear in mind image resolution when migrating image files to an archival format. Almost by definition, archival image formats will not apply lossy compression (rather, they use lossless compression).Gilbert et al. 2023, 625File characterization was executed to obtain definitive file, image, and media information, including format, compression, height, width, depth, and resolution.