Art grounds that are resistant to deterioration or loss of quality, allowing for a long life expectancy when kept in controlled conditions.
I strive to choose art materials of the durable chemical composition (no lignin or acid free, no bleaching or optical brightening agents, etc.) and make my finished work as resistant to ultraviolet and humidity as possible.
As grounds I primarily use rag papers and canvases made from cotton pulp.
I hope that the resulting product would be archival-grade, so your investment in my artwork is as minimum safe from rapid loss of physical qualities, and preserved in the form you received it for your lifetime, provided you care for it.
From the Society of American Archivists:
While no materials meet the ideal definition of 'archival', many archivists use the term informally to refer to media that can preserve information, when properly stored, for more than a century.