General packaging and decoration prints have colorful quality requirements. So what are the factors affecting the colorfulness of packaging prints? A brief analysis is given below.
1 The effect of whiteness and absorbency of paper on the vividness of prints
The whiteness of the paper is the basis for a colorful print. Ideal papers reflect nearly all color shades, while papers that contain gray, black, greenish, reddish, or other color casts absorb some of the incident light, causing the hue, lightness, and saturation of the print to be affected, eventually appearing as color. The difference. This corresponds to the addition of some of the other inks in the ink, which represents the impureness of the finest ink, giving the impression of darkness, turbidity, and color cast.
The main components of paper are cellulose, rubber, fillers, and the like. The ink's flowing part is the connecting material. The pigment of the ink is attached to the surface of the paper by drying the binder film on the surface of the paper. The main components of paper and ink are asymmetric molecules, and when they are close to each other, they rely on the secondary binding force to make the molecules adhere to the paper.
Most of our packaging and decorating products now use coated white paper, wood-pulp noodles, general linerboard, wood pulp linerboard, kraft paper and white cardboard. Due to the differences in the production processes of different paper mills, significant differences in the surface whiteness and smoothness of the paper are caused. Therefore, at the instant of imprinting, the low-molecular part with high fluidity in the ink connecting material is pressed into the large pores of the paper, and the connecting material starts to separate from the ink. If the pigment content of the ink is high, a large number of fine capillaries can be formed in the ink film. These large number of fine capillaries retain the ability of the binder to absorb the binder much more than the fiber gap on the surface of the paper. If the content of pigment is low, ink will adhere to the surface of the paper, causing most of the connecting material to enter the gap of the paper, causing the ink film on the substrate to be thin, and the pigment particles will be exposed, resulting in the final color is not bright.
2 Effect of the Ink Transfer and Rolling Process on Brightness of Prints
If the color ink is not clean at the time of coating, the ink fountain and the ink roller are mixed with other color inks, which will inevitably cause color casts, and also cause the color to be not bright. Therefore, when changing the color, be sure to clean the ink fountain, the ink roller and the water roller, especially when changing the dark color. The usual practice is to clean the dark ink, and then shovel some of the light-colored ink that will be used. After a period of time, clean it.
For two-color machines and multi-color offset printing presses, especially equipment where the upper and lower units share one impression cylinder, it is necessary to pay attention to the occurrence of color mixing. Once color mixing will definitely cause color cast, the color ink will not be bright.
3 Effect of over-emulsification of ink and additives on the vividness of printed products
The traditional way of offset printing mainly depends on the balance of ink and ink to complete the printing process. According to the analysis of the ink transfer process, the emulsification of the ink is unavoidable. However, the over-emulsified ink will cause the printed product to fade in color, become old, etc., resulting in reduced color brightness.
In offset printing, various additives, such as diluting agents and driers, are added as required. Adding too much of these additives can sometimes affect the vividness of prints. Diluents are white ink, white oil and so on. White oil is mainly an emulsion of magnesium carbonate, stearic acid, varnish and water. This emulsion will promote ink emulsification, resulting in dull colors.
The driers are mainly metal soaps, which are also strong emulsifiers. A small amount of driers can stabilize the emulsification of the ink. However, adding too much amount can cause serious emulsification of the ink.
In addition, for prints with a small area of ​​text and graphics, the number of new inks added to the ink distributor roller during each cycle is also reduced, so that these inks accumulated on the ink roller for a long period of time are subjected to several times of mixing of the fountain solution. Squeeze and roll, causing serious emulsification of the ink, resulting in color is not bright.
Factors Affecting the Colourfulness of Packaging Prints
May 09 22:05:48, 2024
A modern Bench makes a difference in any room it is placed. Often thought of as an accenting piece of furniture, just the right bench works its way into your decor and helps tie a room together. In the bedroom, kitchen, entryway, living room or outside on the front porch, benches brings more to the space than just a place to sit. They act as helpful storage, accent furniture, a spot to toss your essentials and of course, additional seating when there might not be space for other chairs.This selection of benches is designed to fit a variety of interiors and you are sure to find one that successfully complements your home's style.
As an alternative to larger seating pieces like sofas, benches offer a surprising amount of versatility. From warm wooden styles to chic metal-and-velvet options, our collection of benches displays a wide range of aesthetic choices to consider as part of your drive to achieve the best interior design possible. These benches range from the luxe and glam to the functional and casual, meaning there`s sure to be an option that works for your needs in any room of the house.
From the bedroom to a Hallway in need of some accessorizing, benches provide a simple solution to a range of different interior design issues. Our benches are designed to balance utility with style, which makes it easy to slot them into empty or underused spaces as part of a home decor and design revitalization project. With their small stature and practical purpose, benches can give you a reason to sit and enjoy more of the different parts of your home than you did before. If you want benches to fit in with different rooms that have different decor styles, you can simply pick and choose from the available options in this category to find the right match.
Benches can also be helpful for decorating living room and other spaces in a new home. If you`re just moving into a new space and you aren't yet sure what to do with a small area by a window, for example, consider setting up a little seating nook using a bench. Benches fill in well where there are no built-in window seats so you can relax and enjoy your surroundings without having to add built-in structures to your new place. If you decide to use that area by the window for something else later on, your bench is versatile enough to be repurposed for another seating area in a different room.
Modern Bench,Leather Bench,Modern Wood Bench,Modern Entryway Bench
Shenzhen Guang Disen Furniture co.,ltd , https://www.gdisenfurniture.com