Infrared spectroscopy can be used to analyze solid, liquid, or gas samples. Here, we discuss the measurement of solids, particularly powder samples, by the diffuse reflection method. The SPECTRO XEPOS and SPECTROSCOUT X-ray fluorescence spectrometers are outstandingly suited for the analysis of powders and sintered metals and thus, also for the analysis of powders used for DMLS. Whether or not colour is a primary characteristic, colour measurement is used as a tool for quality and process control tool for the chemical industry. It is widely used in metallurgy, mineralogy, ceramics, environmental science, and quality control. Powders having an irregular shape and must therefore be measured in a container through an optical window or alternatively can be measured directly by pressing into a solid tablet form.
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