Ink color ink in the coating and ink fountain roller dirty, mixed with other color ink, is bound to cause a color cast, the same result is not bright colors. Therefore, Xie Gang box printing in color change, be sure to put the fountain, roller and water roller clean Dalingshan box printing, especially in dark but also to pay attention to cleanliness when changing a light. The usual practice is that after dark ink wash clean, then shovel light-colored ink to be used on a part of, playing uniform period of time, then wash. For two-color and multi-color offset press, especially in the upper and lower units share one impression cylinder device, but also to pay attention to the occurrence of mixing conditions. Once blending definitely lead cast, resulting in brilliant color ink is not. What are the main factors causing mis-registration of causing misregistration box printing, generally there are four major factors:? ① process operation caused by improper misregistration (generally refers to the transfer of the time and location of the machine debugging wrong); ② Equipment wear and tear caused by mis-registration (general wear and tear parts such as bearings, gears, bushings and other related other pieces): ③ causes of material (with paper texture and wire lock and so on); ④ not allowed to film a small piece of imposition (before printing SMD errors); ⑤ plate deformation (installed version because of the pull strength version over boulders row box printing, resulting in deformation of the plate); ⑥ caused by mutations in other aspects of the production environment such as weather temperature and humidity caused significant changes in the paper severely deformed, cause misregistration. What are the characteristics of smooth gear ① transmission, gear ratio and accurate;? ② compact structure, high transmission efficiency; ③ long life; ④ manufacture and installation of high precision. Changping box printing _ box printing (certified) _ Folding printing from Dongguan Changping beyond packaging products factory provided. Dongguan Changping beyond packaging products plant (www.dgcyp.com) is Dongguan, a leader in printing paper, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Leadership in all walks of life beyond the printing staff warmly welcomed the inquiry negotiations to create a better future beyond printing.