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THE TECHNOLOGY OF COMICS PRESERVATION
The survival of a CGC 9.0 copy of Action Comics No. 1 across more than eighty years is a preservation story as well as a collecting story. Understanding what it takes for paper from 1938 to survive in near-original condition illuminates why most copies did not survive and why the few that did are so valuable.
Newsprint paper from the 1930s—the paper on which Action Comics No. 1 was printed—was produced through a process that left it with high acid content. The acid in the paper attacks the cellulose fibers from which the paper is made, causing them to weaken and yellow over time. This process, called acid hydrolysis, is accelerated by heat and humidity. A comic stored in a hot attic in summer—a common fate for children’s reading material—deteriorates rapidly. A comic stored in a cool, dry environment deteriorates more slowly, but even under ideal conditions the process continues.
The chemistry of the degradation was understood by archivists and librarians well before it became a concern for comic book collectors, because the same issue affected newspapers, books, and other paper documents from the period. Library conservation efforts from the mid-twentieth century onward developed techniques for slowing degradation—storage in acid-free containers, climate control, deacidification processes for less deteriorated materials—that informed later preservation practice in other collecting domains.
For the Action Comics No. 1 to survive in CGC 9.0 condition, it needed to have been stored in conditions that minimized heat, humidity, and light exposure for most of the period since 1938. This does not necessarily mean it was stored in archival conditions—conditions specifically designed for preservation—but it does mean that whoever owned it or stored it over those decades did not keep it in the conditions that would have accelerated deterioration. Perhaps it was kept in a box in a relatively stable environment; perhaps it was placed in a protective sleeve early in its life. The specific history of how the copy was preserved through its first several decades is not documented.