sprint, a4 paper quality than the 100 Extension of CTMP pulp newsprint made good copy. But old newspapers chemical pulp fibers in a paper due process had been bonded to the fiber structure itself dense, reducing the number of cavities, hard surface hydration, fiber becomes "stiff", viscosity reduction, a decrease paper strength . Laboratories and factories Practice has proved that the number of cycles increases paper, the physical strength of the paper pulp declines linearly, each cycle, burst, and tensile strength of the fiber pulp strength decreases to 60 to 70 Peng . Thus, the paper feed back loop with a single fiber is a certain limit. In China, the use of waste paper, especially after inking regenerated papermaking a4 increases the number of myopia, notepad printing began to move toward the eye direction, printing a4 paper choose from a scientific point of view, to reduce the harm of excessive use of eyes. Notebook notepad office making use of a4 paper and the market is the same, usually white, which is why we subconsciously notepad a4 paper that some of the colors, "black and white" is a long presence in people's minds the truth, but because now working pressure, the office staff time increases, the need for a long time in front of the office notepad, a lot of people in the work appeared dry eyes, fatigue, vision loss and, therefore, the printing industry according to the current scientific research, started using yellow notepad office a4 paper were produced. 0 && image.height> 0) {if (image.width> = 700) {this.width = 700; this.height = image.height * 700 / image.width;}} "style =" HEIGHT: 366px; WIDTH : 400px "alt = production office notepad, notepad production src =" edaoyin.cn/uploadfile/2014/0313/20140313105836865.png "> use a light yellow a4 paper production is based on the reflection of light, white a4 paper is a reflective white full-range of light reflected to the eyes will seem harsh, this is one long walk in the snow need to bring sunglasses principle is the same, although there is no reflected light white strongly in the snow, but long on when the white paper will produce visual fatigue, causing eye pain, dryness, vision loss. yellow reflective wave spectrum is minimal, can make people easier to see words on paper, and people's eyes by yellow light stimulus recovery, more soon after prolonged use Notepad eyes will not sour, to a certain extent, protect the eyes, yellow a4 paper might start let users accustomed to, but after a period of time, it will accept such a notebook, so because it's gentle on the eye is not dazzling but like paper. So make use of a light yellow notepad office a4 paper is to meet the needs of today's society to protect the eyes, so long office people eyestrain situation eased, but not all people are suitable for use as a pale yellow a4 paper notepad, so we still have to choose according to their own situation more: notebook notepad printing production case

Layout should be designed according to the printed version of the layout requirements. Printed books such case, you need to pay attention to the

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