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Spectrophotometer for Reflectance Measurement

Textile Industry | 2017-10-28 13:59:31

Recently, we receive customer’s inquiry for measurement of textile reflectance (%). Today we will introduce how to get the reflectance value with portable color spectrophotometer.


For getting the reflectance value, we will need portable color spectrophotometer or spectro colorimeter (CS-286 or CS-288). Our instrument can provide two kinds of reflectance data.

1.Reflectacne data of 30 wavelengths spaced at 10nm interval between 400-700nm.

2.Total Reflectance data (tristimulus value Y)


Now we introduce how to measure and get these two data. The portable color spectrophotometer we are using is CS-580.


We will introduce how to get reflectance data on different wavelength firstly.

The 1st Step: Turn on the instrument and calibrate it.

color spectrophotometer portable

color spectrophotometer portable

The 2nd Step: Put the portable color spectrophotometer on the sample and make sure the instrument closely connects with the sample and no light will enter into the instrument. Press “test” we will get the sample color value as show in the figure.

color spectrophotometer portable


The 3rd Step: Press “Enter” to choose reflectance on instrument.

color spectrophotometer portable


Press “up” or “down” we could see the reflectance spectrum on difference wavelengths. we could see the reflectance data of 30 wavelengths spaced at 10nm interval between 400-700nm. (instrument can show target and sample reflectance data same time)

color spectrophotometer portable


We could connect instrument with PC by USB cable. After measurement, in the software we could see the reflectance spectrum figure and reflectance value on difference wavelengths. It could be save into excel or lus format, the data could be kept for future analysis.


How to get Total Reflectance data (tristimulus value Y)?

1. Connect Instrument with PC software (Color QC software) by USB cable. Then calibrate it. (Choose USB interface then instrument can be connected with software)

color spectrophotometer portable

2. Choose “setup”—“List option”—“Color Space”—“Y” and “DY” (Delta Y from D-Value)

color spectrophotometer portable

color spectrophotometer portable

color spectrophotometer portable

3. After measurement we can see the test result directly on software. Y is total reflectance value. DY is the reflectance difference value between target and sample.

color spectrophotometer portable


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