Paper of ------------- gsm is defined as paper board or board by ISO

The radiation curing which does not require initiator 

A binding method that uses wire, plastic combs or metal rings to permanently join individual sheets of paper together

Joining book signatures together by driving the thread through the center fold 

During cutting cycle, when the knife pulls the material from beneath, the upper layers of the ream are cut shorter than the lower layer. This is termed as 

------------- is used in the cutting machine to prevent the knife from becoming dull and even break.