Ask for the name of this thread loading method and threading method and the manufacturer who can accept customized production (tears for experts in printing industry to answer)

To tell the truth, this binding method is rare, but if it is an order from our company, the binding method will be written as {cross-line hardcover}. Look at your picture sample. The book block is connected in series with four groups of wires, and the wires are directly connected by a stringing machine. Cut the book block into three sides with a three-sided knife to make two hard-faced leather cases. As for how your holster got up, I can't see clearly, because your photos are not recent, so I only see two.

Because it is spine-free, we will indicate the requirements in the binding notes, and when the book printing factory produces this rare book, if the guests require such binding, we will ask the guests to provide samples. As for what kind of manufacturers can accept this order, you may not know what the word "printing" means. Printing means coloring, brushing and copying. Any kind of book can be copied for you as long as there are samples. This printing factory has a very professional production team.

But if the guest doesn't ask for a binding method and wants us to make a white sample for reference, we don't advocate the binding method of providing pictures like you, because the main support point of the book is the four groups of lines on the spine, and your hard cover itself has a certain weight. It's okay to read less, but if you turn over too many lines, it will be loose, and it is inevitable to lose pages. If it is serious, the book will be scattered.

The key point you are optimistic about is that the inner page can be expanded at 180 degrees. If you use the binding method of round ridge and string binding, you can achieve the same effect. Can be unfolded at 180 degrees, which is durable. The appearance is much better than yours because it can cover the lines on the spine.

The above is for reference only. I'll answer without grading.