After paper's specification is refers to the paper makes, passes through the conditioning cutting edge, plans and brings to completion certain size. The past was " opens by how many " (e.g. 8 opens
or 16 opens and so on) to express that paper's size, I use the international standard now, stipulated that by marks and so on A0, A1, A2, B1, B2. expressed paper's width specification. Standing
operating procedure paper's breadth (by X expression) and length (by the Y expression) the proportional relationship is X:Y=1:n.
Generally the printing paper is uses the manifold paper, the manifold paper classification is according to the size minute,