Use at publishing ten variety such as paper of black-and-white newspaper, relief printing plate, hectograph paper, art paper, some offers money with web form, some offers money with flat paper form, some offers money with flat paper form already, offer money with web form again. Master all sorts of pressworking the norms of paper and metric method, want to publishing the personnel of print to be weighed particularly.
　　　　　　　　　　
(one) presswork the norms of paper

Dimension

Flat pressworks the size of paper and form are decided by long, broad measure. A law that its grow broad measure is basis presswork (the most commonly used leave for geometrical progression cut it is 32) be in charge of a branch to set by the country with the requirement of forme. Reel pressworks paper set its width only (or length) , the length of printed sheet (or width) cut on printing machine, so web dimension and the essence that make the same score board size are consistent, just the form differs.

Presswork although the chief broad measure of paper is in charge of sectional provision by the country, but be not simple factitious regulation, have its science basis however: The first should maintain convention to open a law to print all sorts of presswork that go out shapely, do not make imprint the book that give shows a square or narrow strip, feel with incongruous to the person. The 2nd should maintain when using geometrical progression to open a way, differ to count (if 16 mix 32) book figure is similar.

From strive for the angle with shapely presswork to look, paper and the scale that make into the length breadth ratio of the book the person feels the most appropriate are so called " gold is compared " . "Gold compares " grow namely: Wide ＝ 1.618:1.

Want to maintain the book appearance likeness that differs to count, be about to study paper cut (or fold) method. Paper is to press half-and-half to cut cut method into parts to reduce length commonly. Cut into parts cut (or fold) the length after is cut into parts namely before cutting wide, want to maintain cut into parts after cutting, mix cut likeness of the appearance before cutting into parts, must maintain cut into parts the length before cutting and compare widely. Ask namely: ａ : ｂ ＝ ｂ : (ａ ／ 2) , this that is to say, should make the appearance of 32 books and 16, the appearance of 64 books keeps similar, must make the length of paper size and wide be bordering on 1.414:1 than receiving.

Many foreign countries use this length breadth ratio. If Japan makes the same score paperboard 841*1189 (MM) , the international that our country uses is general dimension 880*1230 (MM) .