Colour Difference Meters Profile
In 1931, the CIE(Commission Internationale De LEclalrage)setup a series of visible spectrum color space standards. The Basic CIE color space standards isCIE_XYZ. lt is built on standard visual observerson the basis of ability to see, and it reflects the standards scope of color by eye. Based on CIE_XYZ there are CIE_XvY, CIE_Lab, CIE Lch standard color space, etc.

At present, the CIE Lab color space is the most commonly used in the industry. In ClE Lab color space, L value stands for color brightness and a value stands for the Green-0n-red value, and b value stands for the blue—on—yellow color value. If determine a value of color by only a group Lab, it will be not practical. However,we can determine the differences among them by comparing two groups of Lab values.
 
Colour Difference Meters Manufacturer Technical Features
> Easy operation make you use it easily
> Widely applied to quality control of plastic and printing industries
> Display directly color difference by E*ab  L*a*b  CIE_L*a*b  CIE_L*C*h
> Standard deviation withinE*ab0.2(test condition: choose average values by 12pcs white tabula)
> It can be connected with computer to do the inspection by software with USB expansion interface

Insturments Working theory                         
Compare the color difference between sample and the measured subject then output CIE_Lab 3 groups data, and the 4 groups of E, L, a, b data after comparision
E stands for the totaI color difference
L+stands for partial white, L-stands for partial black(cornpa ring with prototype)
a+stands for pa rtial red, a—stands for partial green(comparing with prototype)
b+stands for pa rtial yellow, b-stands for pa rtial blue(comparing with plrototype)