This is a spectro-photometric colormeter which has been developed along with the establishment of JIS P 8148 "Whiteness Test Method for Paper and Paper Board by Diffused Lightning method (ISO Brightness)", and conforms to the characteristic B of this standard. In addition, various types of whiteness, color difference, fluorescence intensity and opacity can be measured.
Pulse Xenon lamp with highly stable long service-life is used as a light source. Energy of illuminating light at ultraviolet area, which causes a problem when measuring samples containing fluorescence whiting agent, can be adjusted accordingly.
At the time of shipment from the factory, scaling has been performed using the STFI fluorescence standard paper.