Among the rich color management sciences, people often use color tools, not only there are many more common color cards, of course, there are many little-known color tools. So what do the letters on the color difference meter stand for? This question must be confused by many people. Let me answer it below!

　　What is the color difference meter used for?

　　The color difference meter is widely used in the field of color management of plastics, printing, paint and ink, textile, printing and dyeing and clothing industries. According to the Lab, Lch principle of the CIE color space, the measurement shows the color difference △ E and
△ Lab values of the sample and the measured sample. It is suitable for the internal and external color evaluation and data management of the enterprise. In popular terms, the color difference meter can detect the size of the color difference between samples. The measured color difference data provides you with a reference scheme for color matching in order to control the production process.

　What is the colorimeter principle?

　　The color difference meter is an optical measuring instrument that simulates the human eye's red, green, and blue light sensing. It is mainly based on the Lab, Lch principle of the CIE color space. The measurement shows the color difference △ E and △ Lab of the sample and the measured sample, which can measure the sample. Reflection chromaticity, absorptivity, brightness and various color values, etc. It can meet the needs of analysis and control of the quality of various production processes, quality of incoming materials and quality assurance in the fields of plastics, coatings, textiles, scientific research, medicine, food and other industries.

　　How to use the color difference meter

　　1. Set up the whiteboard, press the power key, a boot animation appears, and automatic black and white board calibration is in progress.

　　2. The automatic calibration is completed and the standard measurement is entered.

　　3. Press the test button on the right side of the instrument to read out the L * a * b * absolute value of the standard sample.

　　4. Press the enter key, align the test port with the measured part of the sample, press the test key once, and then remove the lens after the sound of "嘀". At this time, the color difference between the sample and the standard is displayed: dL *, Da *, db *, etc.

　　5. According to the working principle described above, the color difference and color cast direction between the two are determined by dL, da, and db.

　　6. Repeat the third and fourth points to repeatedly detect the color difference between other tested items and the standard sample of the third point.

　　8. If you want to resample, return to the standard sample measurement interface, and press the button to read the data.

　　9. After testing, turn off the power. Store the instrument in a protective bag and box.

What do the letters on the color difference meter mean?　　

   　L, A, B are the chromaticity values ​​representing the color of the object, that is, the color space coordinates of the color. Any color has a unique coordinate value, where L represents the lightness and darkness (black and white), A represents red-green, and B represents yellow-blue Color, automatically compare the color difference between the sample and the test object, output L, a, b three sets of data and color difference △ E, △ L, △ a, △ b four sets of color difference data, CIE
(International Lighting Commission The introduction of Lab color space is as follows:

　　△ Eab (or △ E) is the total color difference, it does not indicate the direction of color difference shift, the larger the value of △ E, the greater the color difference;

　　L: stands for lightness and darkness (black and white), △ L large means whiter, △ L small means blacker;

　　a: Red-green, △ a large means reddish, △ a small means greenish;

　　b: yellow-blue, △ b large means yellowish, △ b small means blueish;

　　◆ The color difference calculation formula is as follows:

　　△ E = [(△ L) 2+ (△ a) 2+ (△ b) 2] 1/2;

　　△ L = L test product-L standard sample (lightness / black and white difference);

　　△ a = a test sample-a standard (red / green difference);

　　△ b = b test-b standard (yellow / blue difference);

　　What does the letter on the colorimeter stand for? Through the above content, I believe that everyone has a clear understanding after a little understanding! Welcome everyone to adopt and share, so as to benefit more people!