Description of color matching principle

The colors can be simply classified as red, orange, yellow, green, blue, purple, black and white. In the color matching principle, color can be determined by three parameters: hue, lightness and saturation.The colors can vary greatly, but the most basic ones are red, yellow and blue, also known as the three primary colors; Orange, purple and green are the three intermediate colors; The color mixed by the above colors in different proportions is called multicolor.

The color matching of coatings must be carried out according to the basic principles of chromatics. The three primary colors and other polychromes all have the relationship of mutual offset, that is, red, yellow and blue are offset colors, and red and green are a group of offset colors; Yellow and purple are a group of offset colors; Blue and orange are a group of offset colors.

In the process of color matching, it is not feasible to distinguish colors by human eyes, so a more objective colorimeter is needed for measurement. The spectrophotometer of Shanghai Lishan can not only measure the specific l, a and b values of the object surface, but also distinguish the color difference with high accuracy. It is a cost-effective instrument of the domestic spectrophotometer, which is sufficient to realize color measurement in the quality control of almost all application fields.

Our instrument’s solution for blackness measurement:
1. According to different sample morphology, select the appropriate model of the densitometer.
2. Selection of measurement scheme
①. National standard GB/T 7048-2012, the emissivity value of the sample is expressed by reflectivity.
You only need to measure the Y value in the instrument parameters. The Y value range is 0~100. The larger the value, the smaller the blackness.
② International standards are expressed by three parameters: MY, MC and dM, where dM=MY-MC.
The MY value is calculated from the reflectivity. The higher the MY value, the higher the blackness.
DM: blue phase black or red phase black,
When dM ＞ 0, it is blue phase; When dM<0, it is red phase;
Generally, the carbon black of blue phase is darker than that of red phase, so the higher the MY and dM, the better.
Select the blackness parameter in the instrument, and directly measure the MY and dM values. The range of MY values is 0~400, and dM is positive and negative.
Some domestic enterprises use glossmeter to measure blackness, and the measurement results are only relevant to blackness, which is not accurate and does not conform to national and international measurement standards.

In addition to measuring reflectivity and blackness, LISUN can also measure color parameters in various color spaces, including CIE-L * a * b, L * C * h, L * u * v, XYZ, Yxy, reflectivity, Hunterlab, Munsell MI, CMYK, RGB, HSB, etc. The indicators include whiteness, yellowness, Tint, metamerism index Milm, color fastness, color fastness, ISO brightness, 8 glossiness, A density, T density, E density, M density, etc. It can meet all your color measurement needs.

LISUN Launches Portable Colorimeter/Chroma Meter is an innovation color measuring tool with powerful configuration to make color measurement easier and more professional; It support Bluetooth to connect with Android and ISO devices, Portable Colorimeter/Chroma Meter will take you into a new world of color management; It can be widely used to measure color value, color difference value and find similar color from color cards for printing industry, paint industry, textile industry, etc.

CD-320PRO Portable Colorimeter

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

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