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Paper drilling is used to bind documents in final form, but having the ability to add, reduce or modify their contents later.It also allows the document to be separated into smaller sections and to be folded easily.
Of course, such an operation requires the right tools, meaning paper drilling machineries that have applications in different areas: offsetprinting ,digital printing,advertising agencies,copy centres and book production, in fewer words in the whole printing industry, paper converting included.
As a printing related task, perforations are classified according to bursting strength or tpi, which refers to “ties per inch” or “teeth per inch.” The bursting strength is in fact, the measurement of pressure required to separate the document at the location where the document is perforated.
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