Brightness and color tester

Purpose
Brightness is defined as the percentage reflectance of blue light only at a wavelength of 457 nm. Whiteness refers to the extent that paper diffusely reflects light of all wave lengths throughout the visible spectrum. Whiteness is an appearance term. Color is an aesthetic value. Color may appear different when viewed under a different light source. Brightness is arbitrarily defined, but carefully standardized, blue reflectance that is used throughout the pulp and paper industry for the control of mill processes and in certain types of research and development programs. Brightness is not whiteness

How to use
Prepare the sample test, 4 sheets minimally
put in sample test in to the tester equipment
Press switch MENU to choose a test
Press switch color at monitor display
Press number (for many point space test)
Press ENTER then ENTER
Press switch MEASURE for doing test, do the test at different space point
Press ENTER (for averages result test)
Result test will be shows on the monitor display

OPACITY, BRIGHTNESS AND COLOR TESTER
Construction

A Chosen display touch screen measure brightness, color and opacity at an affordable price. Simple operation, built-in printer.
Bed
Sample place for measurement
Place holder lens