Tutorial: How to build a DIY book press

When the Boston Comics Roundtable received the copies of one of its books from the printers, the books’ spines had an annoying habit of popping up in the middle two pages. In retrospect, we’d probably pushed out luck in making a 72-page book saddle-stitched (a.k.a. staple bound). You can only fold so many pieces of paper and expect it to lie flat. But I’ve seen this same problem plenty of times with homemade comics.

Bowing staple-bound book

The problem at hand: some books just don’t fold well.

There’s no point in spending all that time inking and lettering just to have your books come out looking unprofessional, so here’s a (relatively) quick and dirty DIY way to build a reusable book press that will flatten the hell out of your comics’ spines.

The guiding principle in this project was to build it as cheaply as possible. In the same spirit, you should feel free to replace materials as you see fit, and as you can find them.

Total cost for the version detailed below: $67.87 (in 2011 dollars). It could conceivably cost millions by the time you read this.

I’m sure you can do better if you can shop at a big box store rather than pricier, independently-owned city stores (much as I love local business).


This particular book press was designed to fit the maximum number of books simultaneously, two stacks at a time. If you don’t need or want to flatten quite so many books, you can easily truncate the length of the planks and use only four bolts.


  • Two (2) lengths of 2″ x 8″ oak board, about 3.5′ to 4′ in length (approx $25-40)
    • This is the most important item. Because the wood will be taking a lot of stress, you should avoid softwoods like pine, despite the temptingly cheaper price. If you can’t find oak, try beech, ash, maple, or cherry
  • Two (2) piece of scrap wood about half to two-thirds the length of the oak board (free, hopefully)If you’re resourceful, you can find these lying aroundSix (6) carriage bolts, 10″ to 12″ in length (approx $2-3)
  • Six (6) wingnuts with threads to match the carriage bolts (approx $1-2)
  • Twelve (12) washers that match with width of the carriage bolts (approx $1)
  • Four (4) 8-10″ mending plates or similar flat plate (approx $1-4)
  • Four (4) saw tooth picture ring hangers (approx $1-5)
    • This can be substituted with a number of things. Scroll down the page to see how they come into play, then use your imagination. The important thing is that they exceed the width of the mending plates

Hardware needed

Note: The actual number of items in the picture above is inaccurate. You’ll need more of each of these things. READ THE LIST OF MATERIALS. The picture is merely illustrative what the items look like: washers, picture hangers, nails, wing nuts, carriage bolts, mending plates, and screws (L to R).

You’ll also need a few tools:

  • Drill
  • Wood clamps
  • Hammer

Before leaving the store

Take the two planks of hardwood and lay them flat against each other. Make sure they are indeed flat. If the wood is warped, it’s not going to do much good as a book press. Also, make sure you have the correct drill bits to match the width of the carriage bolts.  A good hardware store employee should be able to offer suggestions for alternative materials if you can’t find exactly what you need.

Setting up the planks

Arrange the two planks of hardwood so that the edges line up, width-wise. As you can see from the photos here, the lengths of my book press don’t quite match up. That didn’t matter to me, since I was building for function first, aesthetics after.

Then place your scrap wood planks above and below the hardwood. These provide a padding for the wood clamps so you don’t dent your nice oak. Place the scrap wood roughly in the center of the oak. Then clamp down to hold them all in place.

Clamp it together

Clamp your good wood between some scrap wood so you don’t leave clamp marks in your finished product.

Now we’re going to measure for drilling the bolt holes. In order to prevent the wood from cracking or splitting, you don’t want your bolts placed too close to the edge. I placed the holes 1.5″ away from the length-wise edge, and 2.5″ away from the width-wise edge. Be sure to drill all the way through both oak planks. Repeat until your four corner holes are done.

Check the width of the holes. The carriage bolts should be able to smoothly pass through both planks.

Check your diameter and alignment

Check that the holes are wide enough and align correctly for the bolt to pass through.

Before final assembly, we need to drill the holes for two more bolts in the center. Place two or more bolts into their holds to keep the boards aligned. Release the wood clamps. Now measure to the center of the board and make pencil marks for two more holes, each 1.5″ from the edge. Place the scrap wood on the top and bottom of the oak planks, double-check that the planks are aligned correctly, and re-clamp. Drill the two center holes.

Measure twice, drill once

Leave the bolts in the first set of holes when you drill the next set of holes to be sure that the alignment remains accurate. (Yes, I made this in my apartment living room. It was a mess.)


Once the six holes are drilled, place the carriage bolts, washers, and nuts in each hole. You should have a washer on both the top, between the nut and the wood, and the bottom, between the bolt head and the wood. The purpose of a washer is to distribute some of the pressure across a larger area of the wood.

Add the washers on both sides

Add washers on both sides to distribute the force across more of the wood.

Once all the bolts are in place and fit correctly, it’s time to build guard rails from the mending plates. These will provide a the plane against which you can align the books’ spines. There will be two rails for each stack of books.

To begin, take the side of the bottom oak plank (the one with in contact with the head of the carriage bolt). Measure the distance between the one of the side bolts and one of the center bolts. Make a pencil mark at roughly 1/3rd the distance and 2/3rds the distance. The exact spacing is not crucial.

HINT – if you plan on using this for the same size book every time, you might want to grab one of those books at this point. Make sure that the rails will be in contact with the spine of your book. If you plan on pressing several different sizes of books, you could add three or four guard rails spaced more closely together to hedge your bets.

Line spines against guardrails

The finished book press. Note how at least two guardrails are making contact with the books’ spines.

Once your measurements are made, use your drill to pre-drill the holes for the mending plate screws. The pre-drilling will prevent the wood from splitting when you put the screws in, a vital step when working with thin planks like this.

Always pre-drill

Always, always, always drill a small pilot hole before putting a screw into the thin edge of piece of wood. Otherwise you might split it and ruin the whole board.

After pre-drilling, screw in each of the mending plates. Because they’re only anchored in one place, they may swivel back and forth a little. That’s okay.

Now we need to fashion some little sleeves along the top plank for mending plates to slip into. The sleeves are needed to keep the plates from swiveling all over the place. But because they’re completely unattached to the mending plates, you’ll be able to lift off the top half of the finished book press whenever you need to.

The sleeves won’t bear any real weight, so I got creative at the hardware store and opted for an inexpensive set of picture hanger hardware (sometimes referred to as “saw tooth ring hangers” or “frame backs”). But because the rise in them was a little low, I bent them with a pair of pliers until they could accommodate the guard rails.

Use picture hangers as sleeves for the guardrails

Picture hangers made handy sleeves for the guard rails. They don’t need to bear any weight.

It will help if you also make some tiny pre-drill holes for the picture anchor screws, as well. Remember, if you split the wood, you’ll have to start this all over again. And because there will be a lot of pressure on these boards when you’re pressing a book, you want to avoid creating any weaknesses in the integrity of the wood. Once pre-drilled, attach all the picture hooks, as in the photo above.

Bookpress assembled

Everything lines up? You’re ready for a test press.

You’re now done assembling your book press. Lay the whole thing over, so that the bolt heads are on the floor. Unscrew the wingnuts on the bolts and life up the top oak plank. It should lift up without too much
difficulty and come cleanly away from the bottom portion. If it doesn’t, you may want to make larger holes for the carriage bolts to pass through.

If everything worked smoothly, you’re ready for a test drive.

Test ‘er out

As I said before, with this particular design, I wanted to get as many books in as possible, so I built it to accommodate two stacks of books at the same time. The only tricky part of this design is that the columns will always need to have an equal number of books in them at any given time.

Start out with a small stack of books in each side. Line the spines up against the guard rails. If you need to, tip the book press back so the books fall into the rails. Now push down a little on the wood and screw the wingnuts down. If your books have slippery covers and are sliding all over the place, you’ll probably need to make a few adjustments,square up the book columns, then make a few more adjustments, etc.

You may want to place some scrap paper or some already damaged books between the wood and the cover of your book, in order to avoid scratching your salable materials.

The key principle here is PRESSURE. Push down as hard as you can on the upper plank, and keep screwing in the wingnuts. When it feels like you can’t turn any more, stand on the upper plank. I promise, this will give you even more downward pressure. While you’re standing on the plank, make your last tightenings on the nuts.

HINT – if you notice the wood planks starting to bow, you may be applying too much pressure on the sides. Ease up a little, or try and clamp down harder on the center bolts to even it out.

Keep the books aligned as you press down

Depending on the slipperiness of the cover stock, books may slide around as you tighten the bolts.

The waiting game

How long do your books need to stay in the book press? That’s a good question. It will depend on a lot of circumstances, including the number of pages in your book, the type of paper, the amount of pressure you were able to apply, and atmospheric factors like temperature and humidity. I suggest at least several days to a week. If you like, you can leave the books in the press permanently, removing them only when you need to sell them.