The pH value of the dampening water refers to what? PH value is expressed as a wetting liquid containing acid, alkali content value (concentration), with a negative logarithm of the hydrogen ion concentration of the solution pH indicates. ph = 7 is neutral solution, pH> 7 is alkaline solution, pH. Production of the wetting liquid pH value should be controlled to what extent? PS version of the wetting solution pH value, the general control between 5 and 6 students is appropriate. . Wetting liquid PH value properly controlled, the impact on product quality stronger acidity:? Likely to cause the plate flower version, dot becomes smaller, reducing printing anti-Indian forces, ink easy emulsification, resulting blots not easy to do, product the back offset other quality defects. Acidic weak: the printing outlets easy to paste, easy and, easy to play dirty, resulting paste version, dirty and so on. Printing pressure improper use, product quality will be what ills pressure Hengli small box printing, printing is poor, Hengli empty picture box printing factory outlets, no spirit and letter of the field flowers pale, incomplete:? Pressure is too large , dot gain, painting and poorly, poor resolution, the text did not pen peak. Currently four-color machine generally use what form of cylinder arrangement? Generally use seven o'clock cylinder arrangement form. ; Three seven o'clock cylinder arrangement and the use of double-diameter impression cylinder which features ① nip contact width is increased accordingly, can improve ink transfer performance;? ② Since the impression cylinder diameter increases, between units generally use a times the diameter or three times the diameter of the transfer cylinder Hengli transfer paper box printing high-end box, reducing the number of transfer paper, overlay accuracy guarantee: ③ two pay teeth alternately work to extend the service life; ④ drum surface curvature radius, suitable for printing thick paper and cardboard products; ⑤ adopted after seven o'clock and three times the diameter impression cylinder arrangement, transfer paper radians from the nip between the transfer position is greater than the length of the printing paper to avoid tension on the paper peeling effect the transfer of , enabling accurate registration foot and relieve blot-offset. Hengli box printing factory | Hengli box printing | beyond printing by the Dongguan City, often beyond packaging products factory provided. Dongguan Chang-ping beyond packaging products plant (www.dgcyp.com) strong, credible, in Dongguan, Guangdong paper printing industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead beyond printers and you hand into the brilliant, for a better future!