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Golden Age comics, produced primarily during the late 1930s through the early 1950s, are treasured collectibles today. However, many of these comics face deterioration over time due to their original materials and storage conditions. One of the most significant threats to these comics is acidic decay, which can cause brittleness, discoloration, and loss of structural integrity.
Understanding Acidic Decay in Comics
Most Golden Age comics were printed on paper containing high levels of lignin and acidic components. Over decades, these acids catalyze chemical reactions that break down the paper fibers. The result is a yellowing, brittleness, and eventual disintegration of the comic pages. Environmental factors such as light, heat, and humidity can accelerate this process.
The Introduction of Mylar as a Protective Material
Mylar, a brand name for a type of biaxially-oriented polyethylene terephthalate (BoPET) film, has become a popular archival material for comic book preservation. Its chemical stability, transparency, and durability make it an ideal choice for protecting fragile paper materials from environmental damage and chemical interactions that cause decay.
Properties of Mylar That Prevent Acidic Decay
- Chemical Stability: Mylar is resistant to acids, alkalis, and other chemicals that can degrade paper.
- Inertness: It does not emit or absorb harmful substances over time.
- Transparency: Allows for easy viewing without removal, reducing handling damage.
- Strength and Flexibility: Provides physical protection without damaging the comic.
Proper Use of Mylar for Comic Preservation
To maximize protection, comics are often encapsulated in clear Mylar sleeves or stored in Mylar-backed backing boards. Proper handling and storage practices include:
- Using acid-free, archival-quality backing boards in conjunction with Mylar sleeves.
- Keeping comics in a cool, dry environment with stable temperature and humidity.
- Avoiding direct exposure to light, especially UV rays.
- Minimizing handling by using gloves or tools to prevent oils and dirt transfer.
Limitations and Considerations
While Mylar provides excellent protection against acidic decay, it is not a cure-all. It does not reverse existing damage or prevent all environmental risks. Additionally, improper sealing or storage can lead to trapped moisture, which may cause mold or other issues. Regular inspection and proper environmental controls are essential for long-term preservation.
Conclusion
Mylar has revolutionized the preservation of Golden Age comics by offering a chemically stable, inert barrier against acids and environmental factors that cause decay. When combined with proper storage and handling practices, Mylar can significantly extend the life of these valuable collectibles, ensuring they remain accessible for future generations to study and enjoy.