A sleeve fails while you are holding it. A binder fails on a shelf, quietly, over months, while it is supposedly looking after the best cards you own. Nearly all of that damage traces back to four things you decide once, in the shop, before a single card goes in.

▸ THE QUICK VERSION

The ring first. A round O-ring reaches furthest into the page halfway up the stack, and that arc is what leaves crescent dents. A D-ring's front wall sits in the same place for every sheet.

Then the pockets. Side-loading, if the binder will ever be picked up, carried, or handed across a table.

Then the plastic. Polyester, polypropylene, polyethylene. Never PVC.

Then the fill. Buy a size up: a binder is safe at two-thirds full and dangerous at completely full.

What actually does the damage

RING, POCKETS, PLASTIC, FILL — IN THAT ORDER

An open binder is harmless. Every failure here happens in the second after you shut the cover: a shut binder is not a container but a clamp, and the covers are its jaws. Whatever is thickest inside takes the pressure, and that is always the cards.

That one fact reorders the decision. Not the cover art, not the card count printed on the box: what matters is the shape of the metal at the spine, which way the pockets open, what the plastic will be doing to the card in five years, and how much you have asked the covers to close over. Take them in that order — the first cannot be fixed later without moving every card you own.

▸ THE SAME BINDER, TWICE, IN SECTION

The ring's shape decides where the shut cover lands — on one column of cards, or across all three.

Both binders hold the same eleven sheets under the same shut cover, so both carry the same weight. A round ring is widest across its middle, so it pushes furthest into the page halfway up the stack — the shaded crescent — and that bulge lands inside the first column of pockets. It is why the dents collectors call ring dings are crescent-shaped, and why they appear on spine-side cards and nowhere else. The D-ring's front wall stops level with the punched margin. Same load, gathered into one column or spread across three. No cell is empty: a shut cover always presses on something.

Start at the mechanism

O-RING, D-RING, OR NO RING AT ALL

Look at the binder from the end, closed, before anything else. Circles, put it back. Ds with the straight edge against the spine are candidates. The flat back is not a styling choice: it lets the sheets stack squarely instead of curving, and it buys capacity — a D-ring carries more sheets than a round ring of the same nominal size, because a circle wastes the room above and below its own equator.

The third option is no ring at all. Bound binders — sewn or glued along a spine, often with a zip round the outside — have no mechanism to press anything and nothing to work loose. What you give up is reordering: pages cannot be added or moved, so the binder is finished from the day you fill it. A real cost for a set you are still completing; for a run you have already sorted, the calmest thing on the shelf.

Then check which way the pockets open. A top-loading pocket relies on gravity and friction, fine until the binder is tipped, carried or handed across a table. A side-loading page — the packet will say side-load — takes the card in from the edge, so once the page is in the rings the opening faces the spine and nothing can fall out, whichever way up it goes.

The punched margin is the thinnest, weakest strip of the whole page, and when the binder stands upright it is also the strip carrying every gram of the sheet and its eighteen cards.

Then read the plastic

THREE NAMES TO LOOK FOR, ONE TO REFUSE

Packaging says archival safe and acid-free, and neither phrase has a fixed definition anybody is obliged to meet. The plastic's name does. The Library of Congress's own storage guidance names polyester, polypropylene and polyethylene as the plastics to use, and tells you to avoid polyvinyl chloride and anything unlabelled.

PET

PolyesterSold as Mylar or Melinex. The most stable and the most expensive; clear, stiff, and the standard for things nobody intends to replace.

PolypropyleneWhat most good card pages are made of. Inert, flexible, cheap enough to buy properly. The sensible default.

PolyethyleneSofter and hazier than the other two. Fine, so long as the haze is the plastic itself and not a coating over it.

PVC

Polyvinyl chlorideRefuse it. It is plasticised to stay soft and gives that plasticiser up slowly to whatever is pressed against it. The tells are an oily feel and a faint sweet smell as the packet opens.

Surfaces, too: a page that looks slightly cloudy has been coated or heavily plasticised, and neither is what you want lying on artwork for a decade. Clear, and dry to the touch, or leave it on the shelf.

Size it for two-thirds

THE ARITHMETIC NOBODY DOES IN THE SHOP

Binders are advertised by card count, which sounds like capacity and is really a count of pockets. Do the other sum instead; it takes fifteen seconds.

A standard card is twelve points thick — twelve thousandths of an inch, about three tenths of a millimetre. A nine-pocket page filled on both sides holds eighteen cards, so at any single pocket position the sheet contributes two cards of thickness. Stack thirty of those sheets and every pocket position in the binder is sixty cards deep.

← SCROLL THE DIAGRAM →

CARD AT 12 PT · PAGES AND SLEEVES ARE NOT COUNTED IN THESE BARS

Counting nothing but cardboard, thirty double-loaded sheets already stand three-quarters of the way up the inside of a one-inch ring. Add the pages themselves, add a penny sleeve on each card, and the block grows taller than the mechanism meant to hold it — which is the exact moment the covers stop meeting and start pressing.

A binder rated for six hundred cards is telling you how many pockets it has. It is not telling you whether the covers will still close.

Five minutes at the counter

DO THIS BEFORE YOU PAY, NOT AFTER

Sight down the rings

Closed, from the end. Circles are out. Straight-backed Ds, or no rings at all, stay in the running.

Open a page and find the mouth

An opening along the top edge means the cards are held in by gravity. An opening on the edge that will face the spine means they are held in by the binder itself.

Read the plastic on the packet

Polyester, polypropylene or polyethylene, printed as a word. If the only claim is a slogan, treat the plastic as unknown and put it down.

Count your sheets, then take the next size up

Work out how many pages you need filled, add half again, buy for that. Cheaper than the second binder you would otherwise buy within the year.

Shut it and look at the fore-edge

The covers should sit parallel. If they splay into a wedge, the block is already thicker than the mechanism, and the pressure is landing on cards.

If you already own the wrong one

TWO FIXES, BOTH FREE, BOTH TONIGHT

Nobody needs to rehouse a collection tonight. Do the two free things first. Take pages out until the covers meet flat — whatever comes out can sit in a box for a fortnight and come to no harm. Then stand the binder upright, like a book, so the pages hang from the rings instead of the whole stack bearing down on the sheet at the bottom.

After that, empty the round-ring binder in the order that matters: the spine-side column first, because that is the column the arc has been leaning on all along. The rest can wait for the next binder you buy — a D-ring, two-thirds full, made of a plastic you can name out loud.

The layer underneath, the part that touches the card, is sleeves and toploaders. The layer above, for cards being shown rather than stored, is slabs and card display. The rest of this chapter sits on binders and boxes.

ELSEWHERE IN BINDERS & BOXES

How to Store Cards in a Room That Gets DampSTEP 04 · THE ROOM
How to Tell an Archival Page From One That Only Looks Like OneGUIDE PENDING
How to Divide a Storage Box So You Can Find One CardGUIDE PENDING
How to Move a Collection Without Bending AnythingGUIDE PENDING

How to Choose a Binder That Will Not Damage the Pages