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The Working Principle Of Weak Solvent Ink

Jan 14 , 2020

Inkjet printers are inexpensive and have good print quality. They are one of the most popular printers in the market in recent years, and they have been widely used in the inkjet printing industry. Inkjet ink is one of the important elements of inkjet printing technology. At present, green printing has become a general consensus in the industry. Choosing environmentally friendly weak solvent ink as the printing ink is of great significance to energy saving and environmental protection.


The supplier of Sublimation Machine Inkjet Printer will give you a detailed introduction to the working principle of weak solvent ink.


Inkjet inks are divided into dye-based inks and pigment-based inks according to the type of colorant. Dye-based inks are bright, soft tones, and fine-grained, but they have poor fastness to sunlight and are easy to fade. Although the colors are not as bright as dye-based inks, their color fastness can reach half a year or even a year. According to the different solvents used, inkjet inks are mainly divided into solvent-based inks, water-based inks, and uncoated inks and weak solvent inks developed in recent years.


Eco-solvent inks, also known as environmentally friendly solvent inks, are environmentally friendly, uncoated substrates, and weather-resistant outdoors. Its working principle is: the ink is transferred to the substrate through the nozzle of the micro-piezo print head, and the solvent therein penetrates into the substrate, and the solvent and the colorant in the ink are fixed on the surface of the substrate as the solvent continuously evaporates. Form an image. Mild Solvent Ink is based on water-based and solvent-based inks. Compared with solvent-based inks, the weakest solvent inks have the biggest advantage of being environmentally friendly. Compared with water-based inks, weak-solvent inks have higher accuracy and a wider range of applicable media, and can be widely used indoors and outdoors. The performance comparison of each type of ink is shown in Table 2. Summarizing the performance characteristics of weak solvent inks, there are the following four aspects.


Mild Solvent Ink


Mild Solvent Ink


(1) Environmentally friendly

Weak solvent inks are made of alcohols, ethers, and alcohol ether solvents with very low or no corrosivity. These solvents are non-toxic and have a low odor, which makes up for the lack of solvent-based inks and is increasingly accepted by people. 


(2) Good weather resistance

Weak solvent inks are between water-based inks and solvent-based inks, taking into account the advantages of both, avoiding the disadvantages of both, and achieving a good balance in performance. Among them, the weak solvent pigment ink uses a special binder resin and is colored with high-performance pigments, which makes it excellent in outdoor weathering resistance. Solvent pigment inks have bright colors and strong adhesion on most substrates, but their outdoor weatherability is not as good as weak solvent pigment inks.


(3) High printing accuracy

In addition to focusing on the selection of environmentally friendly solvents, weak solvent inks also add special additives to make the ink's diffusion control better, which makes it easier to achieve high precision output.

Eco-solvent inks are commonly used on high-precision Epson printheads. They have the characteristics of fast printing speed and high printing accuracy. Therefore, eco-solvent inks have advantages not only in outdoor advertising, but also in the field of indoor advertising and photographs that require fine graphics Strong competitiveness.


(4) Wide substrates

Weak solvent inks not only maintain the advantages of high printing accuracy, but also overcome the limitation of other inks' narrow applicability to substrates. Among them, solvent-based pigment inks are mainly used for car stickers, outdoor lights, billboards, leather, wallpaper, PVC, etc .; solvent-based dye inks are mainly used for gold and silver cardboard, transparencies, PET, canvas, indoor Photo adhesive, transparencies, glass, tiles, etc.


The above is the working principle of the weak solvent ink introduced by the Resistant Sublimation Ink Supplier.