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Q & A on Post Press Processing Of Digital Printing

       In the packaging and printing industry, some problems need to be paid attention to all the time, especially the relevant processing after printing is of great significance to the printed matter.Q & A on Post Press Processing Of Digital Printing

Q & A on Post Press Processing Of Digital Printing

What details should be paid attention to when selecting binding equipment?Q & A on Post Press Processing Of Digital Printing

       When purchasing binding equipment, pay attention to check whether the paper transfer mechanism (such as paper guide roller, roller, etc.) is in good quality. Q & A on Post Press Processing Of Digital Printing

      If the roller quality is not good, it is easy to damage the printed paper, and the paper transfer roller and paper guide roller will also generate static electricity.Q & A on Post Press Processing Of Digital Printing

Why do the pages of wireless bound books or pamphlets sometimes fall out?Q & A on Post Press Processing Of Digital Printing

      There are many reasons for page loss, including glue and machine. The wireless binding machine used by digital printers generally includes milling back, gluing and covering several steps. Some cheap binding machines do not have milling back at all; Q & A on Post Press Processing Of Digital Printing

       Some binding machines have back milling function, but the back milling processing of the spine is not in place, which will affect the firmness of binding.Q & A on Post Press Processing Of Digital Printing

        In addition, the type and quality of glue also have an impact on the fastness of binding. If the temperature is not properly controlled in the binding process, it will also lead to scattered pages and falling pages of the book.Q & A on Post Press Processing Of Digital Printing

         In the binding process, one parameter is very important, That is, the opening time, which refers to the time required for the adhesive to make the cover of the book firmly bond with the book.Q & A on Post Press Processing Of Digital Printing

       After the book or booklet is bound on the machine, the adhesive still needs a certain time to continue to cure, sometimes as long as several hours. Q & A on Post Press Processing Of Digital Printing

        Therefore, do not read the book immediately after it is bound on the binding machine. You should read it and check it at least 15 minutes later.Q & A on Post Press Processing Of Digital Printing

       In short, in the face of different prices and different quality binding machines in the market, you must pay attention to meet the binding needs of your prints.Q & A on Post Press Processing Of Digital Printing

What kind of prints are suitable for punching and binding?Q & A on Post Press Processing Of Digital Printing

         Punching or drilling binding method is more suitable for binding documents composed of single sheets of paper page by page, which is very suitable for materials used by students or samples used by salespeople. Q & A on Post Press Processing Of Digital Printing

       Especially when some of the contents need to be changed, only one or several pages with changed contents need to be reprinted, and then add them after punching to replace the old pages, without reprinting the whole document or sample.Q & A on Post Press Processing Of Digital Printing

        When using the punching binding method, the paper for punching at one time should not be too much or too thick, otherwise the punching quality will be affected.Q & A on Post Press Processing Of Digital Printing

       When drilling, the drill needle will heat up and cause the image toner of digital printing to melt.Q & A on Post Press Processing Of Digital Printing

        Be careful not to drill too much. When the polyester material is to be punched and bound, it shall be punched rather than drilled as far as possible, because the heat generated by drilling is easy to melt and adhere the polyester material.Q & A on Post Press Processing Of Digital Printing

What’s the difference between screw and loop?Q & A on Post Press Processing Of Digital Printing

         Both spiral binding and loop binding need to punch holes first, and then bind the prints into volumes. The types and specifications of spiral or loop lines used are diverse, including metal materials and plastics; Q & A on Post Press Processing Of Digital Printing

      There are both monochrome and color. Spiral stapling is to use a continuous plastic wire or metal wire to penetrate from the first hole to the last hole of the print; Q & A on Post Press Processing Of Digital Printing

         The ring binding is to “clamp” the printed single page with an independent ring-shaped iron wire or plastic ring through a round hole. Spiral binding and loop binding are characterized by low binding cost and good leveling.Q & A on Post Press Processing Of Digital Printing

        It takes about 5 minutes to bind an A4 booklet by using a manual small desktop punching spiral binding or loop binding machine (which can bind booklets with a thickness of 20-28mm).Q & A on Post Press Processing Of Digital Printing

       If there are a large number of binding, it is best to choose a computer-controlled punching binding machine with a high degree of automation.Q & A on Post Press Processing Of Digital Printing

Can digital printing products also be coated?Q & A on Post Press Processing Of Digital Printing

        sure. In order to make prints more beautiful and durable, many prints are covered with various bright films, matte films and extinction films to pursue different effects. Thermal lamination is usually used in digital printing. This method is easy to use and cheap.Q & A on Post Press Processing Of Digital Printing

What is the stress of choosing film when laminating?Q & A on Post Press Processing Of Digital Printing

        The films used for thermal coating mainly include polyester film and polypropylene film. Q & A on Post Press Processing Of Digital Printing

       Generally, polypropylene film is required to be used when covering thinner film, and thicker polyester film can be used for prints requiring additional protection. Q & A on Post Press Processing Of Digital Printing

      The price of polyester film is more expensive than polypropylene film, but it has high strength and can play a better role in protecting printing products. If both sides of the print need to be coated, it is best to use polyester film.Q & A on Post Press Processing Of Digital Printing

How to avoid curling of printed matter after lamination?Q & A on Post Press Processing Of Digital Printing

       First, if conditions permit, film both sides of the substrate as much as possible; If only one side of the paper is covered with film and the other side is not covered with film, curling is very easy to occur. Q & A on Post Press Processing Of Digital Printing

       However, one thing to remind you that the cover of wireless binding books can only be covered on one side.Q & A on Post Press Processing Of Digital Printing

        Do not cover the second and third covers, otherwise the book block and cover cannot be firmly bonded. In addition, when selecting the laminating machine, Q & A on Post Press Processing Of Digital Printing

       you can also select the rod to prevent the crimping of the laminating printing products, so as to ensure that the coated products are flat and not crimped.Q & A on Post Press Processing Of Digital Printing

How to avoid foaming of coated products?Q & A on Post Press Processing Of Digital Printing

       When hot laminating the printed matter, first ensure that the surface of the printed matter to be coated is clean and dust-free. Secondly, pay attention to the appropriate temperature. Q & A on Post Press Processing Of Digital Printing

       Too high temperature is easy to melt the toner and cause film blistering. In addition, OPP film can be selected in order to prevent wrinkles after folding.Q & A on Post Press Processing Of Digital Printing

Will lamination affect the color reproduction effect of digital printing?Q & A on Post Press Processing Of Digital Printing

       There may be some impact, because the films used in laminating are not necessarily 100% of the packaging machine ‘target=_ Blank > transparent film, so it will affect the color balance.Q & A on Post Press Processing Of Digital Printing

       Therefore, for the sake of insurance, you can try to cover several samples to the customer to see whether the color of the printed matter after coating meets the customer’s requirements, and then formally carry out the coating processing.Q & A on Post Press Processing Of Digital Printing

What is the effect of die cutting on digital printing? Do digital printers need to buy a die-cutting machine?Q & A on Post Press Processing Of Digital Printing

      Die cutting processing can make the final print with special shape or highlight local characteristics to attract everyone’s attention and increase the added value of the product. Whether digital printers need to buy die-cutting machines depends on the amount of live parts they process. Q & A on Post Press Processing Of Digital Printing

          If they don’t live much, the die-cutting machines will be idle, resulting in waste. When choosing a die-cutting machine, you should pay attention to the processing requirements suitable for your prints. Q & A on Post Press Processing Of Digital Printing

        When die-cutting thicker paper, you can choose a platform die-cutting machine, and when die-cutting thinner paper, you can choose a rotary die-cutting machine.Q & A on Post Press Processing Of Digital Printing

        In addition to the way and requirements of post press processing that should be considered from the pre press design stage, what problems should digital printers pay attention to in post press processing?Q & A on Post Press Processing Of Digital Printing

        It is very important to communicate more. This can avoid many problems. Communication among prepress designers, printers and post press processors should be strengthened, and attention should be paid to checking whether the typesetting design meets the requirements of post press processing. Q & A on Post Press Processing Of Digital Printing

       In addition, there are several points to pay attention to: Q & A on Post Press Processing Of Digital Printing

① select the paper suitable for the needs of printing, and check whether the paper format and quantity meet the requirements; Q & A on Post Press Processing Of Digital Printing

② In the process of post press processing, the processing effect of each process should be often checked to ensure that the processing of printed products reaches a high level;Q & A on Post Press Processing Of Digital Printing

 ③ Before considering the purchase of post press processing equipment, you should constantly ask questions, Q & A on Post Press Processing Of Digital Printing

       think twice and look at the operation demonstration of the machine to confirm that it can meet the speed and quality you require and meet your post press processing needs. Q & A on Post Press Processing Of Digital Printing

      It depends on whether the equipment dealer can provide you with spare parts and consumables (such as indentation mold, stapling head, glue, film for film coating, etc.) in addition to selling the equipment.Q & A on Post Press Processing Of Digital Printing

       Meet the folding requirements of most digital printers. Do not drive the machine too fast when folding, so as not to cause paper deformation or wrinkles. Q & A on Post Press Processing Of Digital Printing

       In order to avoid double sheet feeding failure caused by static electricity, the folding machine shall be equipped with an anti-static rod. In addition, Q & A on Post Press Processing Of Digital Printing

       if the indoor humidity is too low, the paper will break when folding, so pay attention to maintain appropriate humidity. For the printing sheet that needs to be folded several times continuously.Q & A on Post Press Processing Of Digital Printing

      Be sure to indentation first and then fold the page, so as to avoid wrinkles or cracks on the paper.Q & A on Post Press Processing Of Digital Printing

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