Hollow board dairy display box screen printing process

First, take orders

Dairy display cases will inevitably bear the product trademark marks of various manufacturers. Screen printing companies must attach great importance to avoid trademark infringement and illegal trademarks. This requires screen printing companies to accept such trademark printing business orders. In the meantime, we must strictly examine and verify relevant documents and copies of the "business license" and "trademark registration certificate" issued by the customer.

Second, before the film

Dairy display cases business is generally provided by the customer to provide CD-ROM, and then get the plate-making company sends out the film. With regard to the techniques of the several plate-making companies that the author touches, they are mainly based on the knowledge of offset printing and do not have the skills for screen printing. Therefore, the professionals of screen printing enterprises must pay attention to the following aspects:

1. The film must be a positive film, which is determined by the screen printing process;

2. Of all the texts, besides the special effects required, special colors must be made.

3. The analysis of the manuscript is suitable for primary color printing or spot color printing. If it is a primary color printing, starting from the printing operation and the long distance viewing of dairy display cases, it is recommended that the final number of screen lines be controlled at 40 to 60 lines; if it is a spot color printing, attention must be paid. Each company's trademark color, quality and safety QS logo color, China Nutrition Society CNS logo color and other national and industrial standards color, to ensure that the future printing does not appear color shift and color; spot color printing but also pay attention to the printing color sequence, to avoid the two colors Imprinting produces an uncoordinated third color;

4 . Depending on the fineness of the entire pattern, the overprint amount of color and color can be set to 0.3-0.5 mm;

5. It is easy to achieve a multi-pattern (color) printing on the screen with plug-mesh or tape closure, which can require the plate-making company to arrange the unconnected parts of the pattern on a film, thereby saving Film costs, and when the official printing can also save a lot of positioning time, change version of the version of the time, to ensure the accuracy of overprinting;

6. The pre-press output of the screen-printed dairy display cases are all large-format output, generally more than 1 m2. While some photofinishing machines of the plate-making company are not large enough in size, they often use the split-out method, and then the collage is printed after the printing. , It is easy to cause a series of quality problems such as printing and printing. It is advisable to find a film-making company that can undertake large format.

Third, blanking and die cutting of hollow board materials

The various properties of raw materials directly affect the quality of printing and the quality of postpress use, which affects the brand image of dairy manufacturers.

1. Hollow plate material characteristics

Hollow plastic sheet is a hollow sheet, also known as Wantong sheet, corrugated sheet, double wall sheet, light weight (hollow structure), non-toxic, non-polluting, tough wear-resistant, waterproof moisture, anti-aging, corrosion resistance, color Rich, economical and durable, it has the properties of anti-folding, anti-stretching, and high strength. It is suitable for screen printing, easy to seal, gorgeous in appearance, it is very free to process, can be bent, can be die-cut, can be pressed Customers request to make different sizes and shapes.

2. The material for air board material and die-cut hollow board are generally 1 to 2 m in width, 2 to 8 mm in thickness, and 2 m in length. They can also be produced continuously as required. Generally according to the final product die-cutting size of 3 ~ 5cm on each side of the material, and then through a professional large-scale circular die presses, through the die-cutting plate reciprocating motion, driven by hollow plate under the action of the pressure roller die-cutting The die-cutting and indentation of the plate are completed at one time, then the waste is discharged and the waste is collected for reuse.

3. The author understands and has proved through practice that the hollow board material produced by Zibo Kelida Plastics Co., Ltd. is very suitable for display box screen printing.

Fourth, print version

Shaiban is the key process in the entire screen display process for dairy display cases:

1. According to the contents of the display box, use 250-300 mesh screen;

2. The frame size is generally chosen to be 120 cm wide and 180 cm long. When multi-color printing, it is necessary to ensure that the tension of the various screens is uniform and uniform;

4. The new screen must be degreasing and roughening treatment. Otherwise, the adhesion of the photosensitive adhesive is poor, and large-area degumming is easily generated during printing, which affects the continuity of production.

5. Ordinary oil sexy light glue is used, according to positive 2 reverse 3 squeegee;

6. Under the premise of guaranteeing smooth development, the exposure time should be extended 1 to 2 times longer than usual.

7. After developing and drying, the screen must be exposed twice or placed under sunlight for 10 to 20 minutes to enhance the scratch resistance and friction resistance of the screen.

8. Repair of minor flaws in the trachoma and pattern parts with a screen-filling paste. Screens with serious quality problems that cannot be printed need to be re-produced.

9. A label with the product name, color name, color order, and the like is affixed to the edge of the qualifying screen frame, and is protected with a transparent tape.

V. Preparation of ink

The hollow board material is a kind of PP material, and its surface is smooth, and the raw material formula used by various manufacturers will be different. This causes the general PP and PE screen printing inks to not adhere well to it, and the tape test method is used to find out 100 % shedding, does not meet the basic requirements such as display case back and forth handling, weather and sun exposure, and ink shedding will seriously detract from the image of dairy producers and their products in the minds of consumers, so the ink must be tested before and after repeated purchases. Blind purchase will bring huge losses to printing companies. At present, the price of the ink used by display box screen printing manufacturers ranges from tens of yuan per kilogram to more than one hundred yuan.

Most of screen printing of dairy display cases is spot color printing. Professional ink adjusters are required to deploy the correct inks first. Paste the labels on the ink boxes to indicate the product names and color names and stamp them for backup.

Sixth, printing

The following guidelines must be observed and performed during printing operations:

1. It is best to use 3 people as a group. Each place a hollow plate, you must wipe the surface, does not allow particles, impurities, debris, etc., otherwise it is easy to damage the screen;

2. Because the hollow board material is first die-cut and printed, it is necessary to distinguish between the front and back sides and the left and right sides. The method is based on the original or physical sample to perform printing positioning and distinguish the front and back sides.

3. Color overprinting must be accurate, and if overprinting is not allowed, it will be "absolute;"

4. The hollow board material has the structure of corrugated board. The surface of the board will have slight depressions and unevenness, and the disadvantages of various shades of ink will easily occur. This requires the printing pressure and the squeegee angle to be uniform, especially in manual printing.

5. During the printing process, it must be compared with the color proofs or samples provided by customers (usually paper), and large color deviations must not occur, especially for various types of spot colors;

6. About every 1/3 of the printed output, compare the color with the oldest printed product to see if there is a significant change;

7. Quality inspectors must do the first inspection, process inspection and final inspection, and make quality records;

8. The printing operator is responsible for the product self-inspection. It should be carefully checked one by one. Once a problem is found, the solvent must be quickly erased to perform the rework.

After the hollow board material has been printed, it needs to be placed on a large drying rack and thoroughly dried. It usually takes about 30 minutes to 1 hour. The completely dried hollow board is finally stapled on a professional box loader. At this point, the production of milk display boxes was completed and the shipments were made according to the quantities required by various regions. With the increasingly fierce competition among domestic dairy product manufacturers, the empty-box display warfare of terminal marketing has also been playing hard. Dairy display cases will produce a good advertising effect, so that consumers will notice the products they want to buy. In view of this, the role of dairy display boxes will become more and more prominent, and some dairy manufacturers will order tens of thousands of boxes at one time, which has huge market potential.

Source: Screen Printing