The secret of primary color cardboard food packaging printing
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For home products such as baked goods or comfort foods, the natural brown appearance of corrugated paper reflects a healthy appearance and a retro feel.
In the past, in the food manufacturing industry, "corrugated paper" had only one meaning: American cheese biscuits. However, today, whether it is bread or hamburger, it is agreed that corrugated paper is a versatile primary color paperboard used to make eye-catching packaging, which is enough to strengthen the brand image and increase sales.
Food manufacturers have long believed that smooth and white SBS paperboard is the only material that simultaneously gives the brand a noble image and maintains consistent performance during high-speed molding filling. Primary color paperboard is used only when there is a large or old package of plain packaging.
However, today's primary color cardboard is widely used in packaging for retail food or food service such as bottle packaging, snack cartons, pancake boxes, and bread boxes. There are many different factors for the rise of primary color paperboard: because of its fiber composition, the primary color paperboard provides maximum strength: its smooth and consistent surface performs well in high-speed manufacturing environments; it has a striking natural brown color. Appearance, pattern reproduction is good. It also allows food manufacturers to respond to new market challenges and new demands with a unique and alternative image.
For example, the complexity of the quality of the food sector forces manufacturers to re-evaluate the way new products are introduced. Customers demand higher standards in taste, appearance and packaging. However, clamshell corrugated cardboard or corrugated cardboard represents a higher quality image. If the fast food restaurant only uses wax paper to package the hamburger, it will not be accepted by the guests.
Food packaging also takes on more responsibility for delivering market messages than in the past. The range ranges from basic company logos to complex cross-cutting details. Today, it is not uncommon for film companies or amusement parks to attract fast-food consumers with discounts or other market messages. Anyway, the space for advertising billboards is empty, why not use it to repeatedly promote sales or guide consumer power into partner companies?
Beverage vendors also use packaging as a promotional tool. Many manufacturers print promotional messages on the barriers used to prevent collisions in twelve or twenty-four bottles.
These and countless other examples show that the use of packaging has been different from the previous one. It's no longer just to prevent collisions during shipping.
Corrugated paper selection
In order to achieve new demands from manufacturers for packaging, corrugated cardboard offers some features that are different from bleached paperboard. For household products such as baked goods or comfort foods, the natural brown appearance of corrugated paper represents health and vintage. The country-style log-decorated steakhouse maintains a consistent image with corrugated outer packaging. Regardless of the others, the unique appearance of corrugated paper is a striking contrast in a large number of white packaging, which makes the product more prominent.
Because many food packaging is designed to enhance its convenience or portability, the strength of corrugated paper is another advantage. The strength of the outer packaging must be sufficient to support the customer's meal. Similarly, the beverage cup must be maintained in a humid environment so that the coffee does not flow to the customer's thigh.
Strength is also a major consideration for frozen foods because the packaging of frozen foods cannot deform, tear, twist or absorb too much moisture during the freeze/thaw cycle. In these respects, corrugated paper is more practical than SBS.
Optimized effect
Corrugated cardboard can be printed in flexo, gravure or lithographic. Although large integrated processing plants are familiar with all types of cardboard, the smaller or first-time store on corrugated board may have some questions about how to achieve the best results. Here are some suggestions for newbies:
◆Color reproduction
It is more vigilant to achieve the correct color reproduction on corrugated board than SBS, because the darkness of the board itself makes the ink look different from bleached board on corrugated board, and the eye-catching color effect is the best. Soft colors are the hardest to achieve the desired ink strength, opacity or wear resistance
If necessary, first add a little white, it will be easier to make a soft or light color that is close to the need. Printing technology is becoming more and more sophisticated, and some people even use UV inks to make color effects better.
Almost all ink manufacturers have developed inks that can be used on primary color paperboard, so consult any of their best recipes before starting any work. Many of them have sample books. Some even have samples of ink on different paperboards.
◆Ink demand and coating
Because corrugated cardboard is not coated, it is also looser than SBS, and special consideration should be given to the inking and coating. For example, primary color paperboard requires more ink. The upper layer of cheap varnish makes the ink more eye-catching, while the high solids and waterborne coatings are more effective than true solvent varnishes. Applying a layer of clay high-solids and acrylic acid also inhibits the separation of the ink pigment from the resin and prevents free pigment from remaining on the surface of the board.
In addition, surface coating increases the wear resistance of the ink, especially objects that are completely covered by the ink. In flexographic printing, the ink roller with a large ink hole has better effect in uploading ink and coating on the sketch board. In addition, in order to enhance surface contact when printing on corrugated paper, it is considered to use a softer flexible sheet and backing paper.
◆Processing performance
Because some uncoated corrugated board materials are quite loose and bulky, dust may be generated during processing. There are several steps to reduce dust. Make sure the vacuum chuck is in good condition before work and make the necessary adjustments to achieve the best operation. The bellows type vacuum chuck is most effective for corrugated paper.
Improve smoothness. The smoothness of corrugated board cannot be compared with SBS board, which is due to the way corrugated board is made. However, many food manufacturers like the rough look and feel of corrugated cardboard, and the image it represents.
The smoothness of the primary color board depends on the manufacturer. The printer needs to evaluate the surface properties of the board to determine the appropriate board. If you need a smoother surface, crepe paper, glue or foil can also help. In addition, paper mills are gradually strengthening the smoothness of corrugated paper.
◆ Die cutting performance
Corrugated board has excellent embossing, die-cutting and die-casting properties due to its strength and predictable fiber properties. However, high-strength and "high-memory" primary color fibers must be deep enough to avoid rebound. The cutter must be sharp. Because of the high fiber strength of corrugated paper, the nicks required on the perforation line are less and less.
◆Adhesive
A high-solids and high-viscosity resin adhesive is suitable for low-temperature bonding because it does not "infiltrate" a large amount of paperboard. Conventional hot melt adhesives also work quickly on corrugated paper and multi-layer coated corrugated paper. Corrugated paperboards are more paper-feeding under high-speed folder-folding machines because they are lightweight.
◆Supplier relationship
Customers must choose a corrugated paper mill that can continue to supply and has a suitable work schedule. In order to educate the first contact with corrugated paper, the supplier will also provide technical service experts to solve the problem on the spot.
Primary color corrugated cardboard has become popular among many retail food and food service industries as it helps food manufacturers respond to new market challenges. As long as these small tips are kept in mind, printers and processors will be able to respond to customer needs and achieve desired performance and maximum efficiency.