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A corrugated paper box is die-cut, creased, nailed, or glued to make corrugated boxes. Corrugated paper box is one of the most widely used cardboard paper boxes, and the amount has been the top of various packaging products. Next, we will introduce you to corrugated paper boxes.

Here is the table of contents.

• What is the technology and principle of the corrugated paper box?

• What kinds of shapes are there in corrugated boxes?

What is the technology and principle of the corrugated paper box?

1. The main printing methods in the corrugated paper box industry are.

Lithographic offset printing (ink color printing), letterpress printing (carton water-based printing). Compared with color printing, water-based printing has high strength, low cost, high production efficiency (fast delivery time), and an overall printing effect close to color printing, which is widely used in the transportation packaging of products.

2. Main production processes of a corrugated paper box.

Corrugated paper box automatic production line, printing process, post-processing, and forming process; printing work has realized the automatic operation of printing, slotting, die-cutting, gluing and packaging in one process.

3. Water-based printing of corrugated paper boxes belongs to the additive color printing method. The color original is electronically color-separated into a reverse image and then printed on a printing press. The ink is transferred from the anilox rollers of the printing press to the printing plate, and then the ink is transferred from the printing plate to the corrugated board. Most of the cartoon paper boxes are also printed using the overlay color method.

4. Prepress technology (traditional plate making)

(1) Color originals processed by electronic color separation into monochrome and then out of the film sheet (negative image soft film).

(2) Back exposure: exposure of the back of the plate with ultraviolet light to form the base of the printing plate.

(3) The main exposure: remove the protective film on the front of the plate, put on the negative picture, cover the vacuum film, vacuum pumping, the main exposure with ultraviolet light, the content of the negative picture transferred to the printing plate.

(4) Wash plate: wash the plate in the plate washer with a potion to wash off the unexposed resin on the printing plate, forming the intaglio printing plate.

(5) Drying.

(6) De-stick: ultraviolet light source irradiation.

(7) Post-exposure: hardness adjustment.

What kinds of shapes are there in corrugated boxes?

According to the shape of corrugated, there are 3 designs of corrugated paper boxes: V, U, and UV.

The V-shaped corrugated waveform is characterized by a high value of plane resistance pressure, which saves adhesive usage in use and saves corrugated base paper. However, corrugated paper boxes made of this waveform are poorly cushioned and do not easily recover from pressure or impact.

The U-shaped corrugated waveform is characterized by a large adhesive area, strong bonding, and a certain degree of elasticity (better recovery). When a corrugated paper box is impacted by external forces, it is not as fragile as a V-shaped flute, but the plane is not as strong as a V-shaped flute.

Based on the performance characteristics of V-flutes and U-flutes, UV-shaped corrugated sticks, which combine the advantages of both, are now commonly used. The result is a corrugated packaging paper box that maintains the high-stress resistance of V-flute and the high adhesive strength and flexibility of U-flute.

Nanjing Lipack Co., Ltd. attaches great importance to customer experience, the pursuit of cost-effective products, to provide more valuable and more impressive corrugated paper boxes, to better enhance customer brand recognition and product sales!

The kraft paper bag is a great paper bag that can be reused and has good support properties and does not break easily. Because of their environmental characteristics, kraft paper bags can also be used as paper shopping bags, which are favored by all, especially in European countries where kraft paper bags are almost always used.

Here is the content list:

• Do Kraft paper bags have several practices?

• What are the performance parameters of kraft paper bags?

Do Kraft paper bags have several practices?

(1) small white kraft paper bags, the general number of such bags, the use of a wide range, many customers require such cheap and durable kraft paper bags, usually the practice of such kraft paper bags are machine forming, machine laminated rope, completely by the machine operation.

(2) the practice of medium-sized kraft paper bags, usually, medium-sized packaging bags are machine laminated molding after the human hand sticker rope and made into kraft paper bags, due to kraft paper bag forming equipment by forming size restrictions, and kraft paper bag sticker rope machine can only stick smaller handbag rope, so the practice of kraft paper bags by the limitations of the machine. Many of the bags do not have the means for the machine to complete the sole production, still have to go through manual production.

(3) large bags, with reverse-head kraft paper bags, thicker yellow kraft paper bags, the practice of these kraft paper bags to be built purely by hand, to ensure quality, these types of kraft paper bags can not yet be put into machine production, these types of kraft paper bags production costs are higher, but also very strong, good quality.

(4) regardless of which kraft paper bags are above, if the number is not large enough, generally used purely handmade, because of the machine production of kraft paper bags loss, there is no way to solve the practice of small quantities of medium-sized packaging bags.

What are the performance parameters of kraft paper bags?

(1) Printing: Offset printing, CMYK printing, screen printing

(2) Handle material: twist paper handle bag

(3) Surface treatment: silver print, gold print, embossed or embossed, spot UV, varnish, matt laminate, gold laminate

(4) Size: custom made

(5) Shapes: flat pockets, square bottom open pockets, square bottom valve pockets, one-piece glued bottom bags (for food packaging)

(6) Material: polypropylene, kraft paper, aluminum foil

(7) Stitching method: paper sealed bottom, heat-sealed bottom, glued bottom.

Nanjing Lipack Co., Ltd is dedicated to the production of kraft paper bags that can be used as paper shopping bags. The company has a team of professionals dedicated to quality control and the continuous pursuit of excellence. At the same time, the company offers bespoke 'one-stop' packaging solutions, from initial design to final packaging delivery, having all the systems in place to produce the highest quality, most impactful packaging that can be delivered quickly. If you are engaged in the kraft paper bag business, you can consider using our cost-effective products.

Nanjing Lipack Co.,Ltd is a collection of all range of packaging products, especially paper packaging products, which including Kraft paper bags, Luxury paper bag ,paper box, paper labels & stickers, paper tags, bubble bags, poly bags, paper tags… we have a professional team committed to quality control and constantly strive for excellence. We provide customized “one stop” packaging solutions, from initial design and to final packaging delivery. We have all the systems in place to produce the highest quality, most impactful packaging, and fast delivery. Click professional team, manufacturing process & quality control to see more about this.

We are headquartered in Nanjing China, and have three manufacturing facilities across China.

We know that the exquisite and fashionable luxury paper box is finalized by a complex process in tandem. The negligence of any process link can lead to the onset of consumption quality accidents. The rigor of the process is necessary to ensure the high quality of high-end paper boxes. Therefore, the characteristics of luxury paper boxes and their printing process are generally what kind of, the next will provide you with a detailed introduction.

Here is the table of contents:

l What are the characteristics of luxury paper boxes?

l What is the printing process of a luxury paper box?

What are the characteristics of luxury paper boxes?

The unique luxury paper box is handmade from 100 - 300gsm paper material with durable high quality. The carrying handle of this premium carton is attached to the inside of the bag with a shoe buckle. The premium carton can be used to hold heavy items, which means it can hold up to 10kg of products.

What is the printing process of a luxury paper box?

1. Later design and what material to choose

The design and manufacture of luxury paper boxes is the key link of the entire paper bag consumption process. Luxury paper box selection of materials, decorative techniques, and performance are inseparable from the use and effectiveness of paper bags. Kraft paper is good toughness, high strength, rougher appearance. Cardboard stiffness is good but poor toughness, used as a paper bag general need for exterior lamination. Copperplate paper has a certain toughness, rich printing color, but the stiffness is worse than cardboard. Emphasize the durability of the choice of kraft paper, luxury packing boxes on the color and stiffness are delicate when the majority of cardboard, and the need for rich and colorful pattern effect, people tend to prefer coated paper. To improve the taste and level of portable paper bags, designers in the post-printing exterior decorative processes on the brain. Of course, no matter what kind of finishing process is used, designers should think about the economic application of paper materials, process design sensibility. For the sake of consumption and quality control, it is indispensable to create a set of complete and clear work engineering drawings when designing, and in a few cases, the goods also need to be confirmed by proofing.

2. Printing

Luxury paper box ordinary large layout color is quite a lot, it is recommended to use high-quality printing machine to stop printing, good printing machine, ink control is more proportional, color brightness is also relatively good.

3. Lamination

Film lamination, also known as post-printing over plastic, post-printing laminating or post-printing film, refers to the appearance of the printed material covered with a layer of 0.012 ~ 0.020㎜ thick bright plastic film and constitutes a paper-plastic finishing process, generally divided into pre-coating and that is coated with two processes. According to the use of different film materials and there are high gloss film and matte film. With the use of environmentally friendly water-based solvents, the environmental protection of the laminating process has been further progress. Non-cowhide luxury paper box more than the use of lamination process, mainly because the lamination can add color concentration, commodity waterproof to avoid dirt function is good, the paper's aging resistance, tear resistance, resistance to tearing and other physical properties generally progress, and then the fastness and strength of luxury paper box lost improvement, bearing capacity is enhanced.

4. Appearance finishing

Hot stamping, UV, varnishing, and other print finishing processes are commonly used in the consumption of luxury paper boxes. It greatly satisfies the pursuit of the paper bag subtlety, high-grade. In the consumption process, it is also necessary to control the key points in these process links.

Nanjing Lipack Co., Ltd. has a team of professionals dedicated to quality control and the continuous pursuit of excellence. We offer customized "one-stop" packaging solutions, from initial design to final package delivery. Buy fancy paper boxes, choose us!

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