PUR binding or Perfect binding, What’s the difference?

Digital Printing London, Marketing, Services, Technical

What is the difference between PUR and Perfect binding?

Frequently misunderstood or simply misinterpreted – perfect binding is not necessarily perfect, but PUR binding might well be. It very much depends on what you want. Each has its merits, but when it comes to adhesion—arguably the most important factor when making books—PUR binding, in page-pull tests, is reportedly between 40 – 60% stronger when compared with traditional perfect binding.

The key difference between the two, in essence, is the glue being used. Polyurethane reactive (PUR) glue is used in PUR binding machines and ethylene vinyl acetate (EVA) is the glue used in perfect binding machines.

Why is PUR binding superior?

Let’s start by declaring from the outset that at Print4UK, we use our in-house PUR binding machine. We think that the benefits of using PUR adhesive justify the slightly higher cost compared with perfect binding. It produces a very strong, yet flexible, spine and with that comes peace of mind.

It is also important to state that PUR adhesive is more effective at sticking to a wide variety of substrates, including UV-cured and aqueous coatings, coated boards and papers and a variety of films and weights of paper.

PUR is also more robust when it comes to remaining intact in extremes of temperature.

So, what is perfect binding good for?

In short, EVA is still very effective and produces strong results. It is a slightly cheaper option when compared with PUR and is commonly used in the magazine industry, for example, where volume is a consideration and may not need to be as strong or withstand long-term demanding use.

In summary, we prefer PUR binding, and it is the binding of choice for many of our clients. We can produce both long and short runs, and converting a brochure from a saddle stitch to a PUR book can make a stunning impression.

If you would like to know more, then why not give us a call or send us an email?