Trading cards start as large sheets of specially engineered cardstock and go through a multi-stage industrial process: printing, finishing, cutting, sorting, randomizing, and packaging. A single facility can occupy over a million square feet of floor space running around the clock to keep up with demand. Here’s what happens at each stage.
The Cardstock That Makes a Card Feel Right
The foundation of every trading card is the cardstock, and manufacturers choose it carefully based on weight, thickness, and internal composition. Most professional trading cards use cardstock between 250 and 400 grams per square meter (GSM). Magic: The Gathering cards, for example, use 320 GSM stock, while many standard playing cards land around 300 to 310 GSM. Thickness is measured in “points,” where one point equals one-thousandth of an inch. An 18-point card is 0.018 inches thick.
What you can’t see matters just as much. Cardstock has an internal layer called the core, and the core material determines how opaque and durable the card is. Manufacturers typically offer four tiers. Gray core is the most basic. White or ivory core is a step up. Blue core offers better opacity, meaning you can’t easily see through the card when light hits it. Black core, sometimes called “casino grade” stock, is designed to be completely opaque, which prevents players from identifying cards by holding them up to light. Higher-end collectible card games tend to use blue or black core stock to protect game integrity.
Printing the Card Faces
Cards are printed in large sheets, not one at a time. A single sheet might hold dozens of individual card faces arranged in a grid, and each sheet runs through the press in one pass. The dominant method for large production runs is offset lithography. In this process, the card artwork is etched onto metal plates. Ink transfers from those plates onto rubber blankets, which then press the image onto the cardstock. This indirect transfer (plate to blanket to paper) produces sharp, consistent color across hundreds of thousands of sheets.
Offset printing requires upfront setup for each plate, so it only becomes cost-effective at high volumes. For smaller runs, typically under about 1,000 units, digital printing skips the plate setup entirely and prints directly onto the cardstock. Digital presses can produce quality comparable to offset at those smaller volumes, making them practical for indie card games, promotional sets, or limited releases. Major brands producing millions of packs, though, rely almost exclusively on offset lithography.
Adding Foil, Holograms, and Texture
Standard cards come off the press and move straight to cutting. Premium and rare cards get additional finishing steps that give them their distinctive look and feel.
- Hot foil stamping uses a heated metal die to press holographic foil onto specific areas of the card under pressure. This creates the sharp, metallic details you see on ultra-rare pulls, where certain parts of the artwork shimmer while the rest stays matte.
- Cold foil works differently. A UV-curable adhesive is printed onto the card exactly where the foil should stick, and the holographic foil bonds to those adhesive areas as the sheet passes through the press. Cold foil handles fine gradients and halftone patterns better than hot stamping, so it’s often used when the foil effect needs to blend smoothly into the artwork.
- Digital foil prints a toner or varnish mask onto the sheet, then passes it through a foiling unit. This method suits short runs and designs that change from card to card, since there’s no custom die to manufacture.
- Textured effects like raised surfaces over holographic areas are sometimes applied using screen printing. A thick layer of UV varnish is pushed through a screen onto specific parts of the card, creating a tactile, raised feel you can run your finger across.
These finishing techniques are applied selectively. In a typical set, the vast majority of cards are standard prints. Only the cards designated as rare, ultra-rare, or special inserts go through foil or embossing lines, which is part of what makes them more valuable to collectors.
Cutting and Sorting the Sheets
After printing and finishing, the large sheets are fed into precision cutting machines that separate them into individual cards. The cuts need to be exact. Even slight misalignment creates off-center borders, which collectors notice immediately and which can affect a card’s grading value.
Once cut, cards are sorted and collated into sets or groups. Each card is assigned a unique sequential number during printing, which helps automated systems track where every card is in the production line. Common cards, uncommon cards, and rares are sorted into separate streams before the next step.
How Packs Get Randomized
Randomization is one of the most carefully controlled parts of the entire process. Every booster pack needs a specific distribution of rarities (a set number of commons, uncommons, and at least one rare), but which specific cards appear in each pack should be unpredictable.
Automated machinery assembles packs by pulling from the sorted card streams. Premium cards like autographs, relics, or special inserts are placed into packs without any specific pattern. Some manufacturers use computer algorithms and random number generators to determine which packs receive premium cards, ensuring the distribution is genuinely random rather than following a repeatable sequence. Packs are assembled with a mix of sequentially numbered cards, and premium inserts are distributed across the full range of those numbers so they don’t cluster in predictable positions within a case or box.
This randomization is what creates the experience of opening packs. It’s also why manufacturers invest heavily in security. Facilities run 24/7 operations in secure environments to prevent employees or outsiders from identifying which packs contain high-value cards before they reach store shelves.
Packaging and Distribution
Assembled packs are sealed in foil or plastic wrappers, then grouped into boxes and cases. Booster boxes typically contain a fixed number of packs, and cases contain a fixed number of boxes. The packaging itself is designed to be tamper-evident so retailers and buyers can verify that packs haven’t been searched or resealed.
The scale of production is enormous. Millennium Print Group, a subsidiary of The Pokémon Company International, operates over 1.5 million square feet of manufacturing, assembly, and warehouse space across facilities in North Carolina and the Netherlands. That kind of footprint is necessary when a single popular set can require hundreds of millions of individual cards produced, cut, sorted, randomized, and shipped within a tight release window.
From Sheet to Sealed Pack
The full journey from raw cardstock to a sealed booster pack typically follows this sequence: cardstock selection and preparation, offset printing of card faces and backs on large sheets, application of any special finishes (foil, holographics, texture) to designated rare cards, precision cutting into individual cards, sorting by rarity, automated collation and randomized pack assembly, sealing, boxing, and shipping. Each step involves specialized equipment and quality control checks to keep colors consistent, cuts precise, and randomization fair across millions of packs.