Green ink will become the future direction of the printing industry

In color printing (four-color printing), it is difficult to obtain ideal blue, purple, and green colors due to impure ink (mainly cyan ink). Also, the amount of ink is limited in printing. For example, if you want to print black pages, you may think that: CMYK is printed at 100%, and it must be very good. However, the answer is: wrong! Four 100% color plates are printed, the paper can not stand, the ink does not dry properly, the paper will stick together, or the ink will spill out of the roller, resulting in not only not ideal black, but a blemish. In terms of experience, the total amount of four-color ink should be less than 300 unless you have close cooperation with the output and printing departments.

Four-color printing ink use

In terms of experience, the total amount of four-color ink should be less than 300 unless you have close cooperation with the output and printing departments. Do not believe? Well, open Photoshop, ask for a New file, convert it to CMYK format, and fill in the darkest black. In short, do your best! Then, open the info display board, put the mouse on the screen, look at the CMYK display of info, add these four percentages, how much? 266! Far less than 300. You must pay attention to this point. Too many four-color totals are absolutely a bad thing. well, let's get back to business. Due to the restriction of the amount of ink, the ratio of black to other colors at the time of color separation is increased, and the image is not easy to be bright. How is it? (Since the total amount of ink is limited during printing, when black is added, the ratio of the other three colors must be reduced.)

The best course is of course to manage the black channel as much as possible. When converting an image into the CMYK color space, the precise creation of the black channel helps to better describe the details in areas where shadows and contrast change. Increasing the amount of detail and increasing the contrast can all enhance the color saturation of the image, which will make your eyes feel that the color of the image is brighter than the actual color.

We know that color separation with CMY tri-color inks will lack contrast and blurring, especially in tonal variation areas and dark areas. With the black channel, the image will appear clearer and the colors will be more vivid. Because black enhances the appearance of the outline effect, that is, played an emphasis on the picture.

However, simply adding black ink does not guarantee perfect color. For professionals, one must care about how much black is added, where they are added, and how to establish the best ink distribution balance between the channels. We have mentioned the term 'separation parameter' in several articles. We'll talk specifically about it later. See the second article, Grasp the Black Channel - Separation Parameters, but for now, please continue to After reading it, they are all related.

The total amount of black ink determines the total amount of black in the image relative to other three-color printing plates. For most types of images, it is more appropriate to set a light black, which is quite dark with the outlines referred to in conventional printing, ie using only the appropriate black to increase the profile and enhance the contrast and detail. If you need to increase the amount of black in the image during color correction, you can start by increasing the black level of the image. This helps maintain the clarity of the image.

Like the composition of general printing inks, water-based inks usually have components such as colorants, binders, and auxiliary agents. Colorants are color rendering materials for aqueous inks, giving the ink a specific color. In the flexo printing, in order to make the print colorful, the coloring agent is generally selected from pigments with good chemical stability and high coloring power; the binder is composed of water, resin, amine compound and other organic solvents. Resin is the most important component in water-based inks. Usually water-soluble acrylic resin is used. The components of the binder directly affect the adhesion function of the ink, the drying speed, and the anti-sticking properties. It also affects the ink luster and the ink-transmitting property. The main amines are amine compounds. Maintaining the alkaline pH of water-based inks allows the acrylic resin to provide better printing effects. Water or other organic solvents mainly dissolve the resin and adjust the ink viscosity and drying speed. The auxiliary agents mainly include: defoamers and retarders. , Stabilizers, dilutants, etc.

Water-based ink PH

The pH of the water-based ink is directly related to the viscosity of the water-based ink, printability such as drying. Experiments show that the viscosity of water-based ink increases linearly with the decrease of PH value, and its drying rate decreases linearly with the gradual increase of PH value. The pH value of water-based ink mainly depends on the maintenance of amines. Volatilization of amines during the printing process causes the pH value to drop. This causes the viscosity of the ink to rise, the transferability to be poor, the drying to speed up, the anilox roller to clog, and the stencil failure. Therefore, to maintain the stability of water-based ink PH value, on the one hand to avoid the leakage of amines.

Problems with the use of water-based inks Water-based inks can be mixed with water before drying.

Once the ink has dried, it is no longer soluble in water and ink. Therefore, the aqueous ink must be fully stirred before use to keep the ink composition uniform. When ink is added, the remaining ink in the ink tank should be filtered out first and used with new ink. Do not allow the ink to dry on the anilox roller during printing so as not to clog the ink hole. Obstructing the quantitative transfer of ink causes printing instability. During the printing process, the flexographic plate must always be wetted by the ink, so as to avoid the blockage of the text pattern on the plate after the ink is dried. In addition, when waterborne inks are found to have a slightly higher viscosity, it is not appropriate to add water indiscriminately so as not to affect the stability of the ink. An appropriate amount of stabilizer can be added to adjust.

Introduction: This article focuses on the low-viscosity LX-2 resin that is currently being put on the market. It is widely used in printing products for coating, printing, printing, and printing, by introducing D3 resin and modified graft-extended packaging materials. Etc. Overcoming the current stimulating odor of natural resins after amines catalyzed neutralization and the two major defects of poor adhesion strength on non-absorbent substrates. For the convenience of title: The synthetic resin is now officially named: LD.

Soybean ink enables Wei Gao to achieve green printing

With the rise of the global green industry, at present, a new environmentally friendly ink - soy ink has become a rookie in the printing industry. Ningbo Weigao Printing Design Company, a Hong Kong-funded company located in Ningbo Development Zone, is using this new type of environmentally-friendly raw material to realize the rapid development of the company.

Innovative materials introduce economic silver-plated conductive ink

Black ink used by people in ancient times was taken from loose smoke and coal and other raw materials. Ink printing is called ink printing. Later, with the progress of science, and in order to save wood resources, people began to make full use of old print and waste paper as raw materials.

TNGGSBORO, Mass., USA, Creative Materials, a manufacturer of conductive inks, coatings, and adhesives, has introduced a new product, the Silver Plating Effect Economy Conductive Ink for the lithography field, the 125-10, the product conductance of the product. The rate can reach 15 milliohms/square mil.

The newly introduced economical conductive inks have excellent adhesion to polyester, polyimide, polycarbonate, glass and other substrate surfaces. Unlike conventional conductive inks, this economical silver-plated conductive ink introduced by innovative materials has excellent flexibility and can be bent with the substrate without affecting and destroying the conductive properties of the material. In addition, this product also has extremely high economic efficiency, which can effectively reduce the cost of processing and products for users.

Innovative Materials also said that the new economical conductive ink can also be used in special fields such as RFID, EMI/RFI, and polyester film printing. The 125-10 ink can also meet the process requirements of wide-format printing and spray-type printing. Innovation Materials said that this new product has been applied to the application market.