e identifiers and monosyllabic words in foreign languages, etc., should not be ranked in the bottom two rows apart. Two, a4 paper a4 paper is one of the important contents of prepress staff should be noted that determines a great range of printed materials. 1, constitute a4 paper a4 paper is made of plant fiber added fillers, plastic materials, pigments and other ingredients into a substance material processing commission. Raw materials constitute a4 paper, mainly straw, bamboo, linen and waste can be utilized so on. Depending on the material, the nature of the constitution a4 paper will be different. A4 paper filler to increase flexibility, to reduce the transparency and flexibility of paper, and surface smoothness a4 paper and the use of a uniform material, such as general printing paper with talc, fine paper kaolin and barium sulfate and the like. Use the right amount of filler should generally account for about 20% a4 paper, the line will reduce excessive Zhang's resistance and flexibility, and will hinder the absorption of the ink, resulting in dusting ills printing. Compound to the small pore a4 paper is padded, a4 paper to improve water resistance, but also improved gloss a4 paper, the paper strength and to act to prevent fluffing effect. Commonly used sizing rosin, alum, starch and the like. A4 paper the toner in order to enhance color purity, most inorganic pigments or organic dyes. 2, a4 paper a4 paper specifications according to different printing applications can be divided into flat and roll paper, flat paper for general printing, web generally used for high-speed rotary presses. a4 paper size in general should follow the criteria established production. Printing, writing and drawing paper paper size class are: web width divided 1575mm, 1092mm, 880mm, 787mm four kinds; flat paper size according to the size of the paper is divided into: 880mm x 1230mm, 850mm x 1168mm, 880mm x 1092mm, 787mm x 1092mm, 787mm x 960mm, 690mm x 960mm of six. Books and magazines Folio format a4 paper size standard, the state is the use of 880mm x 1230mm, 900mm x 1280mm, 1000mm x 1400mm single a4 paper size printed uncut. Because of equipment, production, supply and other reasons, the original 787mm x 1092mm, 850mm x 1168mm size a4 paper, the current can continue to use, but should be noted that the old standard format of this size is to be phased out, after a4 paper size the transition will be a new nat


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