A specialized enclosure designed to safeguard collectible graphic novels and periodicals, typically constructed from materials such as polypropylene or polyethylene, offering protection from physical damage, ultraviolet (UV) light, and environmental contaminants. These enclosures come in various sizes and formats, accommodating different comic book dimensions and thicknesses. Examples include rigid top loaders, flexible sleeves, and hard plastic cases.
The utilization of such preservation methods is paramount in maintaining the value and integrity of comic book collections. Protection against bending, tearing, and discoloration significantly extends the lifespan of these items. Historically, collectors have employed diverse techniques for preservation, ranging from simple cardboard backing to elaborate custom-built containers. Modern enclosures offer improved clarity and inertness, minimizing the risk of chemical degradation over time.