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Print Specifications Decoded: Paper, Binding, and Finishes
publishing
Printer quotes are written in a language that assumes you already know it. Here is what the terms mean, and more usefully, which of them change what a reader experiences and which only change your invoice.
Paper weight and the thing it does not tell you
GSM means grams per square metre. Higher numbers mean heavier paper. Text stock for a novel typically sits between 70 and 90 gsm, illustrated books usually between 115 and 170, and cover boards are measured differently again.
What GSM does not tell you is bulk, which is thickness relative to weight. Two papers at the same GSM can produce noticeably different spine widths. Publishers of shorter books often choose a high bulk paper deliberately so the finished object feels substantial. Ask your printer for a bulk figure or, better, a dummy: an unprinted copy bound to your exact specification. It is inexpensive and it answers questions no spreadsheet will.
Coated, uncoated, and image reproduction
Uncoated paper absorbs ink, giving softer edges and a matte, tactile surface. It is right for text, and wrong for photographs that need detail.
Coated paper sits in three broad finishes. Gloss gives maximum contrast and saturation, and produces glare under lights. Silk or satin sits in the middle and is the default for most illustrated non-fiction. Matt coated holds detail with no shine and is generally the best choice for archival photography and technical illustration.
If your book contains historical photographs, silk or matt will almost always serve them better than gloss, whatever the sample book suggests.
Binding, in order of durability
Saddle stitched means folded and stapled through the spine. Cheap, fine up to roughly 64 pages, no spine to print on.
Perfect bound means pages milled at the spine and glued into a wrapped cover. It is the standard paperback. It is also the binding that cracks if the book is opened flat repeatedly, which matters for anything a reader will use as a reference.
PUR bound is perfect binding with polyurethane adhesive instead of hot melt. Significantly stronger, opens flatter, and costs slightly more. For any illustrated or reference paperback, this is the upgrade worth paying for.
Section sewn means pages gathered into signatures, sewn with thread, then cased or wrapped. It opens flat, it survives decades, and it is what a serious hardback should be. It is the most expensive option and the one most visible to a knowledgeable buyer, because they will open the book and look at the gutter.
Cover finishes and what they cost
Matt lamination is the standard, soft to the touch and it hides fingerprints. Gloss lamination is more durable, more reflective, and shows every mark. Soft touch lamination feels distinctive and scuffs easily, so treat it carefully on dark covers.
Spot UV means gloss varnish applied to selected areas over a matt surface. It is a contrast effect, not a shine effect, and it only reads if there is a clear shape for it to follow.
Foil is metallic or pigment stamped with heat and a die. It is the single most reliable way to make a cover look considered rather than printed, and it works best on a small amount of the design, usually the title alone.
Emboss and deboss raise or press the surface. They add a die charge and they need a design with enough structure to survive being pushed into board.
Each finish adds a setup cost that is largely fixed regardless of quantity, which means finishes are proportionally much more affordable at higher print runs.
Where to spend if the budget is limited
For an illustrated non-fiction hardback, the order of return in our experience: paper that suits the images, then binding that opens flat, then one restrained foil element on the cover. Everything after that is diminishing.
The mistake to avoid is spreading a limited finishing budget across four different effects. One well executed finish reads as intention. Four reads as a sample sheet.
Always ask for a proof
A digital proof checks content and layout. A wet proof or press proof, printed on the actual stock with the actual process, checks colour. For any book where image reproduction is the point, pay for the press proof. It is the last moment at which a colour problem costs you a conversation rather than a print run.
