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Products > sample test > Hangzhou Pnshar Technology Co.,Ltd | Similar Products
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BEKK Smoothness Tester

BEKK Smoothness Tester
test the smoothness off the paper or cardboard (by Bekk method). Bekk smoothness: time in seconds which under a defined pressure differential is required to draw a definite quantity of air at ...

Brightness Meter

Brightness Meter
testing hole is 25mm. 3. Light absorber is provided to eliminate the effect of specular reflection. Peak wavelength of spectral power distribution of R457 whiteness optical system is 457nm and its ...
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