If you want to add special effects to offset printing, you can use fluorescent ink in the four-color printing process, so that the printed image can emit brilliance. Fluorescence can make the image jump up. In offset printing process, fluorescent ink can be used in many ways. For example, if the pink fluorescent ink can be increased by 25% to 50% in the ordinary magenta ink, the image of a pink balloon will become more prominent. Because the color of fluorescent ink is relatively light, it can make the image lighter, while the heavier magenta ink can be used to maintain the depth, detail and contrast of the image. To better control and influence the printing press, pink ink can be added as the fifth color to the pink balloon printing process. This allows selective printing of fluorescent ink in specific areas, thus ensuring the authenticity of other colors, such as the color of the hand holding a balloon. Fluorescent inks can be printed twice for field blocks that need to be emphasized. Economic Benefit and Multipurpose Because non-coated paper can absorb a large amount of ink easily, the color on the printed page can easily lose its vitality. But fluorescent inks can maintain a higher brightness while being sucked into a large amount of paper, because they can reflect more light into the eyes. They can also be used at the end of the printing process to compensate for image details that are not printed on non-coated paper. For example, if an image is dominated by yellow and magenta, then fluorescent ink can be used to replace the printing primary color, thereby improving the brightness of the image.
Bright images with large area of solid color blocks are most suitable for using fluorescent ink. If you use this ink in a dark image with a lot of shadows, you may lose some texture and contrast. Fluorescent ink is about 20% more expensive than ordinary ink. But the proportion of ink in the total cost of a printed work piece is very small. Yellow and magenta fluorescent inks have the strongest impact, while blue inks have the weakest impact. Be careful to choose the coating method of fluorescent ink. Water-based coating is easier to fade fluorescent ink than polishing coating. However, no matter which way to choose, the paint will have an impact on the effect of fluorescent ink. Fluorescent ink cannot be used to accurately test images. Therefore, it is necessary to check the image on the printing press, because fluorescent ink is likely to have a slight color deviation in the printing process. Because these inks are relatively shallow, printing factories tend to increase the amount of ink supplied to the press in order to print brighter colors. These "changeable" pigments are best suited for short-term printing with strong impact promotional materials, because they are easy to fade. Although fluorescent inks are very bright, there is no need to give up shadows. Fluorescent inks look brighter because they use a large proportion of spectral colors, including UV light. They convert the wavelength of UV light into visible light, reflecting more colors into the eyes. Fluorescent ink is made of fluorescent dyes and resins. Fluorescent dyes can brighten the ink, but they cannot emit fluorescence unless resin is added to the solution.