Printing Knowledge

In the production of tobacco packaging printing, curling of paper can lead to serious problems during post-processing and use. For instance, curled sheets can increase positioning errors during downstream processes such as cutting, hot stamping, and die-cutting, which can result in paper jams and machine downtime, severely affecting the efficiency …

It is well known that materials used in the packaging and printing industry, such as paper, plastic, ink, adhesives, and guide rollers (some of which are anodized to form alumina), are insulators. The processes of printing, laminating, rewinding, and slitting are high-speed operations that involve friction, contact, and separation—essentially "sur…

Determining the Line Screen Based on Paper Performance
Paper is the main substrate for printing, and the quality of paper directly affects the quality of printed materials. There are significant differences in the glossiness, surface strength, whiteness, absorbency, smoothness, and dimensional stability of different paper types. Even under the same…

How should the black color be treated in the design file before printing?
- When should overprinting be applied?
- When should you use C0 M0 Y0 K100?
- If the background is a large area of black, how should that be handled?
- Are there any differences in handling large black areas in images?
- For black text at K100, does it need to be outlined?
- …

Why Does Powder Appear on the Ink Rollers, Leading to Poor Ink Transfer?
In the offset printing process, water and ink are two essential materials involved in ink transfer. Water refers to the fountain solution, while ink is the offset printing ink. Only when both water and ink are properly transferred can high-quality prints be produced. However, …

In printing, all text in CD files must be converted to outlines to ensure print quality.
Some images come from Photoshop and contain embedded text in a combination of text and graphics. If this text isn’t converted to outlines, can it still be printed?
Printing typically uses CMYK, where each color represents one cylinder in the press. A sheet of …

To ensure the strength and good adhesion of corrugated cardboard, adjustments should be made according to the configuration of the corrugated cardboard production line.
  1. The ideal moisture content of the corrugated base paper entering the single facer should be controlled between 9% and 12%. If the moisture content exceeds this range, increasi…

Process Characteristics
Metallic etching imitates a frosted effect using textured inks on gold and silver paper, where the texture's coarseness and feel depend on the ink used, allowing limited adjustments during operation. The fabric texture technique, based on metallic etching, incorporates elements from embossed techniques by using uniformly dis…

In color printing, the typical approach is to use four colors: yellow, magenta, cyan, and black, which are printed in a specific sequence. Theoretically, there are twenty-four different printing color sequences possible with these four colors, and any sequence should yield satisfactory results. However, different sequences can lead to varying color…

Lithographic printing is based on the principle that oil and water do not mix. The image areas on the plate are oleophilic (ink-attracting) and hydrophobic (water-repellent), while the non-image areas must first absorb water to become hydrophilic and ink-repellent. One of the characteristics of offset printing is that it uses an indirect printing p…

Packaging Inspection for Paper
Currently, flat paper packaging primarily comes in two basic forms: wood clipboard packaging and wooden box packaging. Qualified flat paper usually has more than two layers of wrapping paper on the outside, further reinforced with wood paneling and tightly bound with metal straps. The wrapping materials used include w…

Someone asked online: "Why does the ink layer not appear bright enough when silver ink is overprinted with other colors on black paper?" Here are my thoughts and insights on this issue for reference.
The so-called "black paper" is a type of specialty paper, and its surface gloss is generally not very high. Therefore, when printing other ink colors …

In the WorldSkills competition for the Printing and Media Technology category, the "Digital Printing Color Matching" contest has emerged as one of the challenging aspects affecting the scores of participants in recent years. As a guiding teacher for the Printing and Media Technology project, I have devised an effective method to address the current…

3D printing, also known as stereoscopic printing, typically refers to stereolithography printing. It employs a principle that simulates the spatial difference perceived by human eyes, recording pixels of different angles and depths on photosensitive materials. With the combination of grating materials, it presents a three-dimensional effect or even…

Screen printing refers to the use of a mesh screen as a printing plate, which is made into a screen printing plate with images through photosensitive plate making methods. Screen printing consists of five main elements: the screen printing plate, squeegee, ink, printing table, and substrate. The basic principle of screen printing is that ink can pa…

Offset printing, an indirect printing method, is named after early lithography, which initially used stone plates. In early lithography, stone blocks were ground flat and used as plates. Later, this method evolved to use metal plates made of zinc or aluminum, but the principle remained the same.
In offset printing, there is no height difference bet…