12/06/2021

Influence Of Abnormal Water Content Of Paper On Printing

Influence of abnormal water content of paper on Printing       Technical practice shows that there are many reasons affecting the printing quality, among which the abnormal water content of paper is also the reason affecting the product printing quality. Correctly understanding the relationship between paper water content and printing, correctly controlling paper water content and ensuring the quality of packaging printing play an important role.Influence Of Abnormal Water Content Of Paper On Printing         As we all know, paper is composed of fibers, fillers and rubber materials. When the environmental temperature and humidity change makes the water content of paper too much, the binding force of fibers, fillers and rubber materials in paper is easy to decline, which will inevitably affect the surface strength of paper.Influence Of Abnormal Water Content Of Paper On Printing        In this way, it is easier to produce poor conditions of powder remo […]
12/06/2021

The absorption process of paper to ink is introduced in detail

The Absorption Process Of Paper To Ink Is Introduced In Detail       In the packaging and printing industry, the ink absorption of paper refers to the ability of paper to absorb ink. It is related to the absorption of low viscosity components of ink by paper pores and the penetration of some components of ink into paper. It is one of the important factors affecting printing quality.The Absorption Process Of Paper To Ink Is Introduced In Detail.       The second stage is from the paper leaving the embossing area until the ink is completely dry. This stage mainly depends on the capillary action of the paper to absorb the ink, which is called the free penetration stage. At this stage, the connecting material is separated from the whole ink and enters the interior of the paper at a fairly slow speed through small pores and the rough surface of the paper fiber.       Therefore, this process is actually a process in which the connecting material is transferred from the ink to the paper hole, […]
12/06/2021

Relevant adjustment requirements before printing

Relevant adjustment requirements before printing       In the packaging and printing industry, printing manuscript plate making needs four-color electrical separation. Apple computer color separation originals include reflection originals (such as color photos, originals, watercolor paintings, oil paintings, traditional Chinese paintings, New Year paintings, gouache paintings, etc.) and transmission originals (such as color reversal films (natural color positive films), color negative films, etc.).Relevant adjustment requirements before printing.       The brightness of the color negative original is opposite to the original, and the color is complementary to the original. For example, the opposite color of red complementary on the negative is green, the opposite color of yellow complementary is blue purple, and the opposite color of red complementary is blue. The light and shade on the positive manuscript are the same as the original, and the color is the same as the original.Relevant […]
12/06/2021

Quality discrimination of polishing oil

Quality discrimination of polishing oil      In the packaging and printing industry, it is often necessary to identify the varnish. Theoretically, the chemical composition of the varnish should be measured. From the perspective of application, a simple method is used to check the quality of polishing oil purchased by users.Quality discrimination of polishing oil.         Smell the smell. The solid content of UV oil is more than 95%, and the volatility of solid content is very small. Therefore, a good varnish tastes less than printing ink. The smaller the odor after curing, the better.Quality discrimination of polishing oil.         Measure the solvent content. Put the polishing oil into a graduated vessel (diameter less than 50mm), place the paper for 12h, and observe how much volatilized. Generally, there is no decline in the position of the surface. If a significant decrease is observed, it indicates that there are too many solvents in the varn […]
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