Wire-O binding also calls double wire binding or twin loop binding. It is a kind of binding which is collected all interior pages and cover in order and bound with double metal wire. The wire-O binding is square hole drilled and the double wire is metal wire. There are more wire colors for choice. For instance, white, black, silver and so on.
Different thickness book, the wire size is different. Meanwhile, the margin on spine edge is larger than cutting edge around 5mm. For example, if the margin on cutting edge is 10mm, the margin on spine edge should be 15mm.
There are more advantages of wire-O binding.
1, Many documents, manuals, calendars are doing with wire-O binding. The manuals and calendars can be opened lay flat. It is 360 degree rotation.
2, Because the wire is metal. So doing shrink wrap is available.
3, Any page count can be done with wire-O binding. It doesn’t restrict by 4 times page count.
4, For wire-O binding, adding a sheet of transparency PVC, coloring paper is available.
Till now, many calendars are bound with wire-O binding. It is the most popular binding method in calendar printing.