The color difference meter is used in a wide range of industries, even in all walks of life. The surface of a certain industry seems to be separated from the color difference meter by thousands of miles, but it is actually closely connected. As long as you deal with color, you can't do without color difference. Instrument, this world is full of color, how can there be industry apart from color management, but some industries do not have such high requirements for color. However, the ink industry is different. It has strict requirements on color difference and the management of color is not allowed.
There are many external factors that can cause the ink color difference. The ink itself also has a problem of color difference between the same batch and between different batches. This is an important indicator of ink quality. However, the color of the ink cannot be judged simply by the naked eye, which requires detection and judgment by a special color measuring instrument, that is, a color difference meter. It is best to use the same batch of inks for a batch of prints (it is best to make a sufficient amount of ink at one time when preparing spot color inks), because in different batches of inks, it is difficult to ensure that there is no difference in ink hue between batches. Therefore, when a batch of inks does not print all the products required, it is necessary to strictly control the selection of the next batch, carefully check and compare with a color difference meter, and choose products with no or small gaps in digital colors.
Testing of ink quality
We should ask the ink supplier to provide corresponding information, and more importantly, to check the technical indicators of the ink, such as ink color, tinting strength, viscosity, light resistance, and heat resistance.
Ink hue and tinting strength detection Hue and tinting strength are the basic items of ink detection, and they have a great influence on the color of the ink. Hue is a specific characteristic of the ink color, which optically corresponds to light of a certain wavelength and frequency, such as: red, yellow, and blue refer to the hue of the ink. Similarly, the detection principle of the color difference meter is to detect these and quantify and digitize the color, so that the user can understand the color change more intuitively. Tinting power refers to the degree to which one ink affects the color change of another ink. When mixing spot color inks, when the hue or color of one of the original inks changes, the color of the spot color ink that is called will change. The importance of the color difference meter in the hue detection of the ink is an accurate factor for the future printing effect of the ink. Therefore, it is indispensable for the printer to choose the ink as the color difference meter. The same ink manufacturer also depends on the color difference meter to ensure the same model. There is no color difference between the two batches of ink.
For the newly provided ink, generally adjust its viscosity to the upper machine viscosity, proof with a printing machine, print a color sample of this ink on a solid plate, or drop a few drops of this ink on a pressure-adjusted color development wheel. Drag on the surface of the substrate with a certain pressure and speed, and display a ribbon as a color sample. You can also use a squeegee. Observe the effect of these proofs. If the ink layer is uniform and smooth, the coloration is good, there is a certain gloss, the ink color is strong, and the standard color card provided by the same color supplier (which can be provided by the ink factory) is basically the same, then the hue of the ink is explained. Meet the requirements. Finally, a certain amount of ink for this test can be sealed and stored as a reference wet color sample for the next hue test. The next time the same type of ink is purchased, the control of the sample cannot be observed only with the naked eye. The naked eye has certain limitations, and the color cannot be seen by the naked eye beyond a certain range, so using a color difference meter will give more accurate Find the correct contrast you need.
For inks that have been used before, you can adjust the viscosity of the ink to an appropriate value, use the color development wheel to make a good sample, and compare it with the qualified color sample or standard color sample that was retained last time to initially check whether the hue is consistent. Another method is to wet the sample of the tested ink with the ink that passed the last test, and place a few drops on the color wheel about 1 cm apart and scrape them out side by side. At this point, two adjacent color bands will be left, and comparing the two color bands can more accurately determine whether the hue is the same.
In fact, there are still many applications of color difference meters in the ink industry. Here, I only analyze the impact of color difference meters on the hue detection of inks. I won't say much about others here. In fact, from the perspective of color difference meters on ink hue, It is not difficult to influence the excellent difference meter is an essential industry tool in the ink industry.