[Note] This is one of the tests to see the durability of “Archival Disc” in stringent conditions. Archival Disc is a technical starndard for professional optical discs for high-capacity data archiving with high security for a long term. Sony’s “Optical Disc Archive” solution utilizes this technology.
“Benefits of Sony’s Optical Disc Archive”: https://pro.sony/en_GB/technology/optical-disc-archive
“Archival Disc” white paper: https://assets.pro.sony.eu/Web/supportcontent/E_White-Paper-Archival-Disc-Technology_r2.pdf