Most comic book collectors remember the exact moment they realized their collection was more than just a pile of entertainment. For some, it was seeing a childhood favorite behind a glass case with a thousand dollar price tag. For others, it was the heartbreaking discovery of “foxing” or rust on the staples of a book they thought was safe in a box. The transition from a casual reader to a serious curator begins with a shift in perspective. You no longer see paper and ink as a disposable medium; you see it as a fragile historical artifact that is actively trying to destroy itself through its own chemistry.
Comic books are essentially a cocktail of high acid wood pulp and volatile inks. Left to their own devices, they will eventually yellow, become brittle, and crumble into dust. Learning how to store comic books is a race against time and chemistry. This weekend, you can master the four pillars of comic preservation: the materials of bagging and boarding, the physics of storage, the surgical precision of pressing, and the financial calculus of professional grading.
The Chemical Warfare of Bags and Boards
The first line of defense is the bag and board. While most shops hand out a free bag with every purchase, those standard supplies are often the equivalent of a plastic grocery bag: functional for the short term but dangerous for long term residency.
The Mylar Standard
If you take away only one lesson from the science of preservation, let it be the superiority of Mylar. Mylar is a biaxially oriented polyester film. This means it has been stretched in two directions during manufacturing to create a dimensionally stable, chemically inert barrier. Unlike the cheap polypropylene bags that eventually “off gas” and become cloudy or oily, Mylar will not break down over decades. It is the same material the Library of Congress uses to store the Declaration of Independence.
Mylites come in varying thicknesses, typically measured in mils. A 2 mil bag is the industry standard for high end collections, providing a crystal clear view of the cover art while remaining rigid enough to prevent the book from sagging. If you are handling Golden Age keys or museum quality pieces, 4 mil “Archives” offer nearly impenetrable protection, though they take up significantly more space in a storage box.
The Truth About Backing Boards
A board is not just a stiff piece of cardboard to keep the book flat. Its primary job is to act as a sacrificial lamb for the acid inherent in the paper. Most standard boards are only coated on one side with a thin layer of calcium carbonate, which neutralizes acid for perhaps five to seven years. Once that buffer is exhausted, the board itself begins to turn yellow and eventually starts leaching acid back into the comic.
Serious collectors opt for acid free, pH neutral boards that are buffered throughout. When you use a board like the E. Gerber Fullback, you are giving your comic a buffer that can last for decades. These boards are noticeably thicker and lack the “shiny side” characteristic of cheaper alternatives because the entire material is chemically safe.
Physics and Environment: How to Store Comic Books
Even the best Mylar bag cannot save a comic book sitting in a hot attic or a damp basement. The environment is the silent killer of paper. High temperatures accelerate the chemical breakdown of wood pulp, while high humidity invites mold and causes the staples to rust.
The Vertical Rule
Never stack comic books flat in piles. The weight of the books at the top of the stack will eventually crush the spines of the books at the bottom, leading to “spine rolls” and indentation marks from the staples of the book above it. Always store comics vertically, standing on their bottom edges.
The box you choose matters as much as the shelf it sits on. While the classic white cardboard “short box” is a staple of the hobby, corrugated plastic boxes are becoming the preferred choice for those in humid climates. Cardboard is essentially a giant sponge that will soak up moisture from the air and hold it against your books. Plastic does not have this flaw.
Light and Air
Ultraviolet light is a precision weapon against comic book ink. Even indirect sunlight will fade a vibrant red cover to a dull pink in a matter of months. Your storage area should be dark, cool, and well ventilated. A common mistake is thinking that airtight storage is the goal. In reality, vintage comics need to “breathe” slightly so that the gases they naturally release can dissipate. If those gases are trapped in a completely sealed environment, they can actually accelerate the yellowing of the pages.
The Art and Controversy of Comic Pressing
For decades, any alteration to a comic book was considered “restoration,” a dirty word that decimated the value of a book. However, the hobby has recently reached a consensus: comic pressing is not restoration; it is conservation.
What is a Press?
Pressing involves the calculated application of heat, pressure, and sometimes moisture to remove non color breaking defects. Think of it like a high stakes version of ironing a shirt. If a comic has a “finger bend,” a “dent,” or a “warp” from improper storage, a professional presser can often flatten those fibers back into their original position.
The keyword here is “non color breaking.” If a crease has physically broken the ink on the cover, leaving a white line, no amount of pressing will fix it. Pressing cannot put ink back on the page; it can only reshape the paper.
The Dry Cleaning Component
Most professional pressing services include a “dry clean.” This does not involve chemicals or liquids. Instead, the technician uses specialized archival sponges and erasers to gently lift “surface dirt,” “sooty buildup,” or “pencil marks” from the white areas of the cover. A successful clean and press can take a book from a “Mid Grade” 6.0 and elevate it to an “Eye Appealing” 8.0 or higher.
The Financial Calculus: Is CGC Grading Worth It?
The ultimate question for many collectors is whether to “slab” their books. Third party grading companies like CGC (Certified Guaranty Company) and CBCS (Comic Book Certification Service) evaluate a book, assign it a numerical grade from 0.5 to 10, and seal it in a tamper evident plastic holder.
Calculating the ROI
Grading is not cheap. Between the submission fees, the shipping insurance, and the handling costs, you can easily spend $50 to $70 per book. Therefore, you must ask: will the increase in market value outweigh the cost of the service?
As a general rule of thumb, CGC grading is worth it if the book is a “key” issue (a first appearance or a major historical milestone) or if you believe the book will grade at a 9.6 or higher. A modern book that is worth $5 raw will often sell for $100 or more if it receives a 9.8 grade. Conversely, slabbing a random issue of a non key title is usually a losing investment.
Case Study: The 9.8 Gamble
A collector recently purchased a raw copy of Ultimate Fallout #4 (the first appearance of Miles Morales) for $400. To the naked eye, the book looked perfect, but it had a slight wave in the paper. The collector sent it for a professional press ($20) and then to CGC for grading ($40). The book returned as a 9.8. On the current market, a CGC 9.8 of this book sells for roughly $2,000. By investing $60 in care and grading, the collector increased the value of the asset by over $1,500.
The Downside of the Slab
While a slab protects the book from physical damage and provides a “liquid” grade for easy selling, it also ends the book’s life as a readable object. You can no longer smell the old paper or flip through the advertisements. For many purists, this is a bridge too far. Before you grade, decide if you are a “collector” who wants to interact with the history, or an “investor” who wants to protect the equity.
Strategic Action Plan for Your Collection
If you are looking at a messy shelf and feeling overwhelmed, take a breath. You do not have to fix everything in one night. Use this tiered approach to prioritize your collection:
The Tier One Keys
Identify any book worth more than $200. These should be moved into 2 mil Mylar and acid free Fullback boards immediately. Store these in a separate, sturdy box.
The “Maybe” Pile
Look for books that are in exceptionally high grade but aren’t necessarily “keys” yet. If they look like they could be a 9.8, consider a clean and press to maximize their future potential.
The Reading Run
Your common issues can stay in standard polypropylene bags for now, but set a calendar reminder to check them every five years. If the bags look wavy or yellow, swap them out.
The Environmental Audit
Check your storage room with a humidity meter. If you are consistently above 60% humidity, invest in a dehumidifier. It is cheaper than replacing a ruined collection.
People Also Ask (FAQ)
Can I press my own comics at home?
A: Technically, yes, but the learning curve is steep. You need a dedicated heat press with precise digital temperature controls and archival materials like parchment paper and stainless steel plates. Most beginners “bake” their books or cause “spine splits” by using too much pressure. It is highly recommended to practice on $1 bargain bin books for months before touching anything of value.
How often should I replace my comic bags and boards?
A: If you are using polypropylene (standard “poly” bags), you should replace them every 5 to 7 years. You can tell they are failing if they feel “crinkly,” “oily,” or have a yellow tint. If you use Mylar, they are essentially permanent and likely will not need to be replaced in your lifetime.
Does CGC grading protect against UV light?
A: Standard CGC slabs do not have significant UV protection. While the plastic provides a physical barrier against dust and hands, the ink will still fade if left in direct sunlight. You should still store graded “slabs” in a dark area or behind UV resistant glass if you choose to display them on a wall.
What is a “Purple Label” or “Restored” grade?
A: If a grading company detects that someone has added color touch, glue, or tape to a book, it receives a “Restored” grade (often a purple label from CGC). This usually drops the value of the book significantly, sometimes by 50% or more compared to a “Universal” blue label of the same grade. This is why professional “restoration removal” is a growing part of the pressing industry.
Final Thought
The beauty of comic collecting lies in the balance between the art and the asset. There is no right or wrong way to enjoy the hobby, but there is a right way to ensure that these stories survive for the next generation. Whether you prefer the tactile experience of a raw book in a Mylar bag or the clinical perfection of a 9.8 slab, the goal remains the same: stewardship. Respect the paper, understand the chemistry, and your collection will remain as vibrant as the day it first hit the newsstand.
