Preprinted Carton Problems and Improved Case Analysis II

Two advantages and disadvantages of preprinting:

â–  Large quantities of commodity orders are required: The applicable products must usually be long-lived products, such as beer, instant noodles, beverages, dairy products, and other types of automatic packaging cartons.

â–  The cost of the first plate making process is relatively high: if it is a color separation product, the plate making cost is relatively high.

â–  Higher ink and printing costs: Because many paper mills currently do not calculate the cost of printing alone, prepress reel flexographic printing machines have high equipment costs and require higher ink prices.

â–  The pre-press work has a long lead time: the time required for planning, proofing, trial production, and overall production preparation is longer than the average postprint. (However, after obtaining the parameters of the production materials of the paper processing plant several times at the flexo printing plant, it becomes simple and standardized.)

advantage:

â–  Beautifully printed: 80LPI can be directly printed on regular kraft face paper, and 125LPI can be printed on advanced white top liner, such as KemiGraph White Top Liner produced by Finnish forestry.

â–  No printed ribs (washboard).

â–  accurate color matching.

â–  Direct overlaying after preprinting can also reduce the board's strength due to post-printing. Therefore, the overall cardboard material can reduce the grammage and reduce the raw material cost. Achieve low-weight, high-strength demand!

â–  Improvement of processing efficiency: The direct machining of the printed paper sheet is directly applied to the board to cut into cardboard. The remaining processing is only slotting and gluing.

Adopting a pre-printing method of professional division of labor to produce cartons, although the printing costs are relatively high, the production costs can be naturally reduced through the improvement of production efficiency, and the product prices maintain a relative competitive advantage. As long as paper mills are focused on the production technology and efficiency of paperboard, flexo printing companies provide professional services on printing.

Three Preprint Step byStep

1 Confirmation and correction of manuscripts

When the customer's manuscript is obtained, all the parts of the text pattern should be confirmed, and an appropriate percentage of the length and width of the printing should be set in accordance with the number of layers of the paperboard. Since the unit price of the flexographic version itself is not cheap, all pre-jobs before work can't be careless! Most graphic designers are not clear about flexo printing. In the design of originals, offset printing is often used to design the color separation. This also results in the inability to reach the customer's requirements during the formal printing. Therefore, the flexo printer should It is in line with the expectations of both parties to properly understand and communicate with the designers and customers themselves about the flexographic conditions.

2 Confirmation of paper condition

Different papers produce different printing effects. The printer must understand the characteristics of the paper itself. For example, the smoothness determines the resolution of the print. If the smoothness of the paper is good enough, the resolution of the print can naturally follow the offset, if the paper The surface is rough and dry. During the platemaking process, the number of color separation lines should be appropriately adjusted, and the customer should be well-communicated and understood so as to avoid a cognition gap in delivery.

3 plate making

Platemaking is the most important success key when deciding on-line printing. The natural success rate of a good version is high. The level of color separation of a platemaking company depends on whether the printing company is in good communication with the plate making company. The QualitvControl of the plate making factory must be thorough. In addition to the requirements, before choosing to formally cooperate with any plate-making company, the plate-making company should be required to provide the Fingerprint test version to measure various parameters on the printing press. Both parties can make appropriate amendments according to the parameters, so that they can do more with less. Platemaking companies are hard to find, and only continuous communication can produce a win-win situation. In addition, we must pay attention to the choice of plate material. It is very important to choose the appropriate hardness and plate-making depth in the printing of dots and on the ground. Basically, we should provide printing paper samples to make the most correct judgment for the plate-making factory during plate-making. !

4 Selection of Anilox Roller

The Anilox roller is the heart of flexographic printing. The most important point of view is the penny and the goods. I personally have confidence in European and American products, especially in the anilox roller above 300LPI, personally strongly recommend PRAXAlR And HARPER two brands, in the transfer of ink has a very stable effect!

Of course, the cleaning and maintenance of the anilox roller is absolutely indispensable on weekdays. The printing must be able to achieve the effect of copying, so it is absolutely necessary to keep the ink hole of the anilox roller clean at any time.

Generally, the ratio of the number of anilox roller lines used in different printing resolutions is 1:5 or 1:6. If it is a high-smooth paper with a high-resolution image, it is of course the best configuration ratio of ?:6. , In combination with high-concentration inks can produce excellent print analysis effect, but also can reduce the use of ink; and in the general paper is recommended in the ratio of 1:5, spot color printing with the use of ANILOX ROLLER 300LPI ( Depends on paper quality).

5 Ink

In the preprinted carton manufacturing process, most people are most concerned about whether or not the ink can withstand the hot plate temperature on the corrugating machine. Our company has also been exposed to many different packaging prints in addition to the preprinting service of the paper maker. And wear-resistant inks have also been involved for a long time. Therefore, we did not have any major problems in this area.

Ink At present, our company cooperates with Japan's Huatian ink (known as Sakata ink in Shanghai). Due to the long-term cooperation between both parties, as long as the company makes a precise job request, Huatian ink can make an appropriate corresponding ink system for the company. use. In addition, our company also uses automatic ink dispensing equipment made in Italy, which is relatively stable in the hue management of ink. The real focus of ink use is the following:

â– Color density: High color density provides good surface coverage, but also provides ink to adjust the hue of the space

â– Viscosity: Because the viscosity cups used in each home are different, we only provide you with reference to our standards. Japan Co., Ltd. No. 4 Cup, spot color ink 18s-25s, YMCK four primary color inks average between 12s-15s. When printing on the line, the operator must regularly detect and make proper viscosity adjustment within 30 minutes. If there is an automatic viscosity controller, it will be more ideal. (The company adopts automatic and manual detection in parallel)

â–  pH control, the pH of each color should be slightly different, basically the pH of the first color or printing in the field must be higher than the subsequent color, to ensure that there is no problem when coloring, this is a little common sense but often It is ignored by the printer.

â–  The choice of ink resin, the ink used in different papers and different processing processes must be different, so the printer must require the ink factory to provide a variety of resins to match, whether it is wear-resistant, water-resistant, heat-resistant, etc. Must be able to deal with!

After the above five factors are fully grasped, they will enter the on-line printing stage. Apart from the stability and accuracy of the printing equipment itself, this is the management of the operators. I believe that the readers must have a unique side in management. , so we will not go into details here, just remind you of the basic aesthetics of the printing operators. Printing is basically a copy of the United States. The person who prints must have a certain perception of aesthetics, not an aesthetic sense of independence, but must have a universal sense of beauty. Although most of them have samples and inkjet drafts for reference during printing, But in the absence of adequate information and the need for various real-time adjustments, this ability helps solve problems in printing (to be continued)