1. 产生飞墨的缘由
1. Reasons for Flying Ink
油墨转移时，在两个相接触的墨辊处，纤维物在两处或两处以上，被切断或拉长时产生断片，因外表张力成为球状。此时，纤维物与断片界面存在的双电层被毁坏，一局部留存在油墨中，另一局部以相反的电荷逸向大气。当纤维物缩短时，油墨中残留的电荷逐步堆在墨辊及纸张外表。断片因带有和油墨相同的电荷，靠近墨辊或纸张时，被排挤于空中构成飞墨。
When ink transfers, at two or more contact rollers, the fibers are cut off or elongated to produce fragments, which become spherical due to external tension. At this time, the electric double layer existing at the interface between the fibre and the fragment is destroyed, one part is left in the ink, and the other part escapes to the atmosphere with opposite charges. When the fibre is shortened, the residual charges in the ink gradually pile up on the surface of the ink roll and paper. Fragments, with the same charge as ink, are squeezed into the air to form flying ink when they are near the ink roll or paper.
当高速机用黏性大的油墨，低质量的连结料时，易使油墨在墨辊旋转中，拉生长丝产生严重的飞墨现象，因而不同型号的印刷机需求选择相应的油墨来匹配。
When high-speed press uses high-viscosity ink and low-quality linking material, it is easy to make ink rotate in the ink roll, drawing filament produces serious flying ink phenomenon, so different types of printers need to choose the appropriate ink to match.
2. 影响飞墨的要素
2. Elements Affecting Flying Ink
(1)油墨黏渡过大，油墨在墨辊出口处被拉长，易产生飞墨，同时还会构成传墨不匀，使纸张拔毛脱粉，纸张从橡皮布上剥离艰难，易花版、掉版等;黏渡过小，墨层团结不佳，易产生飞墨，同时易使油墨乳化，起浮脏、糊版、网点扩展，影响印刷产质量量。
(1) Ink stickiness is too large, ink is elongated at the outlet of ink roll, which is easy to produce flying ink. At the same time, it will make the ink transfer uneven, making the paper dehairing and dedusting, paper peeling from rubber cloth difficult, easy to pattern, offset and so on; too small stickiness, poor ink layer unity, easy to produce flying ink, and easy to emulsify ink, float dirt, paste plate, dot expansion, affecting the quality of printing.
(2)墨辊上墨层愈厚，飞墨愈大。打样在铜版纸上，墨层厚度在1.2μm时，版上油墨只需抵达2.8g/m2就行;但用胶版纸印刷，版上油墨少要抵达4g/m2。遇到纸张性能对油墨黏附力不好的状况，易构成墨辊堆墨，从而产生飞墨。
(2) The thicker the ink layer on the roller, the larger the flying ink. When the thickness of the ink layer is 1.2 micron, the printing ink only needs to reach 2.8 g/m2, but when printed on offset paper, the printing ink on offset paper should reach at least 4 g/m2. When the paper performance is not good for the adhesion of ink, it is easy to compose ink roller stacking, thus producing flying ink.
(3) 墨辊外表凹凸不平及外表干结龟裂时，局部油墨层加厚，墨雾量增大，易产生飞墨。
(3) When the outer surface of the ink roller is rough and cracked, the local ink layer becomes thicker and the amount of ink mist increases, which is easy to produce flying ink.
(4) 印刷速度增加，飞墨增大。
(4) The printing speed increases and the flying ink increases.
(5) 空气相对湿度小，促进飞墨产生;湿度增大时，电荷减少，飞墨质变小。
(5) The relative humidity of air is small, which promotes the production of flying ink. When the humidity increases, the charge decreases and the quality of flying ink decreases.
(6) 假定油墨中润版液太多，构成严重的W/O型乳化油墨，黏度急剧降落，墨丝变短，会产生严重的飞墨现象。同时，浸入油墨的润版液还会腐蚀金属墨辊，在墨辊外表构成亲水层而排挤油墨，构成金属墨辊脱墨。
(6) It is assumed that too much embossing liquid in the ink constitutes a serious W/O emulsified ink, and the viscosity drops sharply and the ink filament becomes shorter, which will cause serious ink flying phenomenon. At the same time, the embossing solution immersed in the ink will corrode the metal ink roll, forming a hydrophilic layer on the surface of the ink roll and extruding the ink, forming a metal ink roll deinking.
(7) 高分子量油墨的连结料，在油墨团结时容易拉生长丝，产生飞墨。
(7) The binder of high molecular weight ink is easy to pull the growing filament and produce flying ink when the ink is united.
3. 如何消弭飞墨
3. How to eliminate flying ink
(1) 选用的耐醇类油墨，使其顺应高速印刷。
(1) Select high-quality alcohol-resistant ink to adapt to high-speed printing.
(2) 定期将胶辊拆下来彻底清洗，使墨辊墨层平均，传墨性能进步。
(2) Remove the cots regularly and thoroughly clean them, so that the ink layer of the roller is averaged and the ink transmission performance is improved.
(3) 酒精浓度控制在10%-15%之间，过低或过高都不适合。
(3) The concentration of alcohol should be controlled between 10% and 15%, too low or too high is not suitable.
(4) 水斗液用量不宜过大，否则构成墨丝变短，不利印刷。
(4) The amount of bucket liquid should not be too large, otherwise the ink filament will become shorter, which is not conducive to printing.
(5) 在油墨中参与电解质时，飞墨会减少，随电解质的参与，导电度增加，飞墨现象会完好消逝。
(5) When electrolyte is involved in ink, the flying ink will decrease. With the participation of electrolyte, the conductivity will increase, and the flying ink phenomenon will disappear intact.
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