What is the purpose of the chroma meter?

Chroma meter is an instrument used to measure the color difference of objects. To put it simply, it is used to measure the color difference between objects, such as spraying, paint, ink, printing, etc. It is a different color tool that is often used in color related industries. The chroma meter has powerful performance configuration, making color measurement more professional; The instrument can be connected to Android or IOS devices wirelessly, greatly expanding the application boundary of color measuring instruments; It will take you into a new world of color management, which can replace color cards such as printing, coating and textile, and realize the functions of color reading and color card searching.

CD-320PRO Portable Colorimeter

So what is the purpose of the chroma meter?
1. Color matching measurement
When users get a sample, they need to reproduce the same color as the sample. At this time, they need to repeatedly sample. Previously, the difference between the sample and the standard sample was compared by human eyes. When it is within the allowable range, the process is handed over to the workshop for production Because of the subjective factors of the human eye, it is difficult to determine the difference. At this time, a colorimeter can be used to measure the difference between the small sample and the standard sample, and determine whether the color difference of the sample conforms to the range according to the difference, so as to reduce the uncertainty of human eye observation.
Here’s an example:
If the color coordinate of the standard sample is:
L *=22.75, a *=22.58, b *=13.83 (i.e. (L) brightness value is 22.75, (A) red is 22.58, (B) yellow is 13.83)
Set the measured value of the standard sample as the standard, and then measure the sample to obtain the sample results:
L*=22.88，a*=20.32，b*=10.85；
Δ L*=0.13， Δ a*= -2.26， Δ B *=-2.95 (0.13 light, 2.26 green, 2.95 blue)

It can be seen that red (or green) and yellow (or blue) should be added when the sample formula is revised next time. The specific adding degree can be determined according to the test results, and repeated several times until the color difference is within the allowable range. The experienced color mixing master can determine the proportion of the formula between 2-3 times based on the value of the color difference meter.

2. The role of chroma meter in quality control
When products are put into production, due to the changes of many factors in production, color deviation may occur in batches of products. In this way, we must often use a color difference meter to measure the color deviation in production to adjust the production process to achieve product color consistency.
For example, the mobile phone case (as shown in the following figure) needs a color difference meter to check whether the color is qualified when the material is supplied.
For example, plastic parts shall be free of deformation and distortion (not acceptable if it exceeds 10mm);
The color consistency of plastic parts should be free of impurities, color difference and many other factors often occur in the production, which leads to the deviation of product color. Therefore, the color difference meter should be used to constantly detect and adjust during the production process;

Mobile phone shell

Before leaving the factory, the finished products, samples or color cards shall be taken for testing to ensure the conformity of the products.

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.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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