custom spiral yo book printing The surface of custom spiral Yo book printing looks bright in color, but sometimes customers say that there is a contradiction in color, not as bright as the color of his original publicity album. In such a situation, how do we consider it? In other words, there is a stronger inspection method? Below we will interpret the test method of color.

custom spiral yo book printing image color is produced by yellow, magenta, blue three primary color inks according to different proportion superimposed, generally measuring whether the color of the printed image measures the color on the interface, only measuring the quality control bar printed at the same time with the printed image, the control bar is generally placed in the print number of the trawled. Using the measuring instrument to detect the corresponding graphics of the control strip can obtain the printing quality information content, such as the relative density of each color ink, overprint rate, business outlet expansion, relative density of business outlet, neutral gray recovery, gap and other main parameters, so as to distinguish the image level blending color copy status.

Generally, there are two measurement methods for testing color printed images, namely, density meter measurement and colorimeter measurement.

1: Density meter measurement

Density meter is a key instrument and equipment in color mixing, printing plate making and printing. This kind of measurement method has always been a common objective way to evaluate the quality of the printing industry. The density meter is cost-effective and widely used. When the density meter measures the color surface, it only obtains the relative amount of the color ink in the printing. Therefore, in the color measurement and comment, the density meter has limitations, and it is not a standard color measurement instrument.

2: colorimeter measurement

The colorimeter is based on the visual effect response that the color triirritant value XYZ is measured immediately on the surface layer of the measured color. After calculation, the value of the measured color is obtained, and this value can also be converted into other uniform color main parameters. The colorimeter is a density meter containing three broadband network color filters. Because of the deviation of the components and basic principles of the instrument itself, the accuracy of the eye-color measurement value is not very good, but because of its low price, it is still a common color difference instrument.

In fact, in the whole printing process, there are many independent variables that harm the quality of printed images, in order to better fill the bad harm caused by this independent variable, the printing press at this stage, such as the printing press manufactured by Heidelberg, Germany, Europan and Mitsubishi, Japan, the key is to adjust the three main parameters, the temperature of the ink delivery equipment, the amount of ink supply and water flow.

In printing production and manufacturing, printing paper ink and printing plates and other printing image quality factors when this element has been determined, how to manipulate the image color quality when carrying out image copy production and manufacturing in the printing press, generally adjust the printing work pressure, according to the printed image copy quality regulations, print paper thin and thick printing plate and other standards to adjust the printing work pressure, Make the image business outlets get good reproduction.

Above are some basic theories and professional knowledge of the color inspection methods of some colorful images.

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