When choosing the binding wire, we should pay attention to its quality, some rings because the surface of the plastic coating is not strong enough will cause cracks in binding. Too thin a loop will cause problems such as poor binding. After the loop is locked, no more pages can be added unless the coil is removed. The double coil binding cost is higher than the single coil, of course, the binding effect is better and more durable. The use of double coil bound album, when reading to be able to spread out any page completely, very convenient to read and query. Books with a thickness of less than 30 mm, such as reference books, technical manuals, recipes (recipes), VIS manuals, and architectural drawings, are most suitable for this binding method.
The characteristics of Yo double loop wire are:
Firstly, the envelope is usually made of kraft paper, which is a kind of environmental protection material. Because of its high strength and durability, it has become the basic requirement of environmental protection theme. Secondly, the inner core uses recycled paper, which purifies the waste paper and regenerates it after beating, which is beneficial to protecting vision. The environmental protection loop wire is cost-effective.
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