What to do before binding double coils

What to do before binding double coils

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Double coils, also known as YO coils, are the first choice for many print bindings. What should be done before choosing to bind the double coils, first the size and size of the double coils should be determined.

Conventional double coils have a maximum inner diameter of 25.4 mm, or 1 inch. Material suppliers usually use a proportional method to indicate the specification, that is, 25.4 mm 16 aliquots, and the inner diameter of 25.4 mm double coils are 16/16. Other common The YO loop specifications are also 5/16, 6/16(3/8), 7/16, 8/16(1/2), 9/16, 10/16(5/8), 12/16(3 /4), 14/16 (7/8) and so on. For example, the cover of the desk calendar + the thickness of the text is 10mm. If there is no gray board, the YO circle with the inner diameter of 13~14mm should be selected. The corresponding specifications are 14/25.4, 8.82/16, 9/16 (usually take the larger inner diameter value). Calculation). The

It should be noted that if the customer has additional requirements on the size of the two coils, after calculation and verification, the two coils with appropriate dimensions and satisfying customers are selected depending on the situation. If there are any doubts in the calculation process, a white sample confirmation should be made.

Double coils should be carried out before binding, and the specification and size should be confirmed to avoid wrong binding. Confirmation beforehand can also be carried out according to customer requirements. Otherwise, it may cause great losses.