Minolta Spectrophotometer CM3600d color measurement apparatus works within the range of visible light 360 – 740 cm-1. Samples that can be measured are solid, flat, powders or crystals and liquids. Liquid samples are measured as a transmittance measurement.
Method: A white shadowless light is directed into the sample. The light reflected from the sample is detected. Every wavelength of light stands for a specific color. The color differencies between samples may be measured by using a color coordinate, consisting of black-white (delta L), red-green (delta a) and yellow-blue (delta b) coordinates.
Portable Erichsen Picogloss 503, a 3 different simultanious angle gloss meter. Three angles 20, 60 ja 85 degrees can be simultaniously measured.
The traditional tool to measure pH-levels