The standardized movement begins with the safety and reliability of the expensive duplicated hardware and the exchange of digital data, and produces the relevant measurement methods and the standards for quantifying the printing parameters. At present, it is seeking process definition for digitized information transmission. 
   Generally speaking, each country has its own standardization organization before the International Organization for Standardization. 
    In the United States, there is an organization called the image technology and Standards Committee (CGATS). It is accredited by the US National Bureau of standards (ANSI), which specializes in the development of image printing standards. The international organization for Standardization (ISO), composed of representatives from all over the world, has the final say. 
    There are a number of other standardization organizations that are not introduced here. 
    Some standards will help China produce its own ink color standard. Here we discuss some interesting standards. 
    A great deal of work has been done in formulating these standard documents, which are now published in public. In other words, if you think these documents are helpful in establishing your color standards, you can use them or refer to them. 
    First, the American Standard CGATS.4 "image reflection density measurement" is introduced, which includes terms, measurement methods, image element elements and operation steps. This standard focuses on the correct use of densitometer, which is the foundation of establishing ink color standard. In printing preparation, the printing workers are used to measure the thickness of ink film with a densitometer. This standard enables everyone to use the same method to measure, and is of great significance for the future definition of different printing process standards. 
    CGATS.5-1993 image technology - spectral measurement and chromaticity calculation for image printing technology is also an equivalent standard for spectroscopic photometry. The spectroscopic measurement in the SWOP ink inspection procedure is based on this standard. 
    The important connection between CGATS. 4 and CGATS.5 is that the geometric conditions of density measurement and spectrophotometric measurement are all 0/45, so the spectrophotometer can also be used as a densitometer. This is another feature of the new handheld portable spectrophotometer currently popular in the industry. These two standards are the tools needed to measure colors, characterize various printing processes and process colors. 
    I said CGATS.6 "Image Printing Specification" (Draft), similar to ISO 12647. Ultimately, these standards define the color of the ink used in various printing processes, from lithography to gravure to screen printing and flexography. 
    Another important standard for printing ink is ISO2846 "offset printing ink - colorimetric characteristics". This standard is earlier than any American Standard for the definition of ink color. Sometimes it is also seen as a European standard. It has been recently revised. 
    Now, the relevant parties are sitting together to study the practicability of this standard. Many technical representatives from Japan, Germany and the United States participated in the discussion. Each participant is asking the question: "which country's ink can become the color standard of ISO? "Of course, SWOP is a candidate, but European color is the current standard. No one knows for sure what the Japanese color standard is, but only SWOP and Japanese ink have wet ink samples. 
    European ink is very close to a set of target points in color, and there is virtually no place to sell standard ink. The German representative provided some ink that was in line with the current standard. 
    The three sides of the United States, Japan and Germany will ink the same ink layer thickness, that is, the range of 0.7-1.19 grams per square meter, printed on the same paper. As a result, the color standards of the three countries are quite close, and they can become an international standard. The situation in China's ink may also be the case. These minor adjustments include adding a little blue base to magenta in the US and SWOP, adding a bit of green to the cyan of Europe. Due to the overprinting and transparency of color, the standard has not yet been completed. 
    This is a potential reference material for comparing the color of Chinese ink with that of other countries. This document includes printing production and evaluation of near standard reference colors. It needs to be explained again that you can't get ISO 2846 ink anywhere, but you can check whether the color of your ink is close to the ISO2846 ink color CGATS standard and the color standard in the ISO standard.