In 2001 Norsam Technologies, Santa Fe, New Mexico, developed High Density Rosetta (HD-Rosetta) archival preservation technology, which "uses unique microscopic processes to provide analog and/or digital data, information or pictures on nickel plates." Density could be 20 times that of microfilm/microfiche.
196,000 pages of text could be etched with an electron microscope on a two square-inch plate.
"Benefits of the HD-ROSETTA Nickel Tablet System:
"Few environmental controls required
"Immune to technology obsolescence
"High temperature tolerance
"Immune to water damage
"Unaffected by electromagnetic radiation
"Highly durable over long periods of time."