Because the ink dries too slowly, the ink is too soft, too thin, and the amount of ink is too large, the ink on the printed piece of printed matter sticks to the back of the upper piece of paper. Most of this phenomenon occurs in the solid (or dark) parts of the printed matter with large ink. Sticking pages, pasting, and forming blocks (commonly known as sticking together) is the most serious phenomenon of sticking back, which refers to the situation where a bunch of printed materials are stuck together. The second side of embossing and sticking dirty means that the first side is printed on the second side immediately after printing. As a result, there is sticking during printing, which is mainly caused by the following factors: (1) Paper with a rough printing surface requires a large amount of ink. At present, the following measures are generally adopted to solve the sticky dirt on the back of printed matter: (1) Use quick-drying ink and use infrared dryer for web offset presses. [Related Links] In recent years, printing companies in many regions of the country have no ink sticking or printing adhesion within a short time after the ink is dried and filmed after printing the finished product. Not slippery, a serious phenomenon of stickiness or sticking to one piece when cutting or packing. The reproduction of this phenomenon is actually caused by the softening point of the ink binder of packaging and printing products being too low. Of course, some inks may cause excessive surface dry internal moisture caused by mistakenly adding too much slow-drying solvent or inhaling water when the ink is diluted for printing. Approach (1) Strict selection of ink varieties produced by regular manufacturers with technical parameters. [Case 2-9] A factory in the south processed a batch of wine boxes. The field area was relatively large. The surface was sticky and the back was rubbed for dozens of days after printing. After investigation, it was found that this phenomenon occurred in more than one printing factory. Many printing houses have similar situations. [case study] This is related to the local temperature and humidity. In general, if the temperature is low and the humidity is high, the finished products or semi-finished products after printing must be strengthened to avoid the above failures. [Case 2-10] A factory used J2205 machine and 157g /? Paper to print the portraits of two opposite sides. When the yellow and magenta colors were printed, the sky blue and black were printed. open. [Case Analysis]: There are two possibilities for this phenomenon. One is that yellow and magenta inks are heavier in color and larger in area, and the other is that the ink emulsification is more serious. In this regard, it is not only necessary to pay attention to the amount of wetting fluid, but more importantly, the printed semi-finished products are shaken after the ink surface is formed into a film, that is, the semi-finished products are stacked on another paper table after shaking. We could make different size of Color Packaging Box and Paper Inner Box base on your design.we aer the China Hang Tag ,Printing Label,Cardboard Boxes,Paper Bags Manufacturer and Supplier. Paper Inner Box Hang Tag,Printing Label,Cardboard Boxes,Paper Bags Manufacturer and Supplier. Xing Hua Printing Factory , https://www.xinghuaprint.com
(2) Printing on both sides of smooth paper.
(3) The amount of ink is larger when printing on the solid ground or at a denser dot.
(4) When printing on oxidative drying ink on paper with poor absorption.
(5) If the amount of ink desiccant is too much, it is easy to oxidize and generate heat in the paper stack, causing the ink to stick and make the paper stick together.
(6) Ink emulsification causes stickiness.
(2) Use powder spray that prevents stickiness on the back.
(3) Adopt a cooler to reduce the height of the pile of paper.
(4) Increase the printing pressure and reduce the ink volume for rough paper.
(5) Control the PH value and dosage of the wetting fluid to prevent ink emulsification.
(6) Adjust the temperature and humidity of the workshop and rearrange the printing color sequence.
(7) The field area of ​​the picture and text is too large, and strengthen the ventilation after printing.
(8) Adjust the amount of desiccant.
(9) The method of using anti-sticking agent or sticking backing paper.
(2) When printing, the substrates stained with oil or wax should be surface-treated.
(3) Select the ink with higher softening point in the ink system.
(4) In the dry printing, when the printing ink of one color is about to dry, the printing ink of the next color is printed.
(5) Strictly control the temperature and humidity of the printing workshop.
Ink sticking and back rubbing failure during printing