Colorimeter is an optical analysis instrument developed based on colorimetry. Therefore, various colorimetric parameters are involved in the process of color measurement, among which the common ones are: 45/0 and d/8, SCI and SCE, 2° and 10°, L*a*b* and Lab, XYZ and Yxy. Initial users are generally not very clear about these similar parameters, which are introduced below.

The CIELab and CIELCh modes of colorimeter are two commonly used colorimetric models in colorimeter. The CIELab model is the most commonly used color measurement model of colorimeter, while the CIELCh mode is a model derived from CIELab. There is a certain relationship between the two. This article introduces the meaning of the color difference values of the CIELab and CIELCh modes of colorimeter?

CIELab and Hunter Lab are commonly used color measurement spaces for colorimeter. Both color spaces use the three parameters L, a, and b to express color, but their meanings are different. This article analyzes the difference between CIELab and Hunter Lab.

When working, the colorimeter generally relies on the CIELab color space, and outputs L, a, b values, and color difference values such as △L, △a, △b, △E after colorimetry by comparing the color difference values between the sample and the standard. This article introduces the range of L, a, b of the colorimeter and the meaning of Lab color difference values.

The color difference unit, NBS, is derived from the unit of color difference formula which is established by Judd-Hunter. In 1939, the American Bureau of Standards adopts this color difference formula and calculates the color difference acc

There are three major elements to perceive color: light, object and observer. Any change of these three elements will influence the observers color perception. When the light source and the observer dont change, then the object will determi