I have used a spectrophotometer to analyse colour samples. How do you interprete the curves, for example prussian red, since there are many peaks shown?
Unfortunately I cannot answer your question without more details on what you are hoping to accomplish. Some applications, like identification of pigments or their concentrations, are performed directly with the spectral reflectance measurements. Others, like color evaluation and control are completed using colorimetric parameters such as CIE XYZ or CIELAB L*a*b* values computed from the spectral measurements (often by software that comes with the instrument). A great introductory reference to learn about these different ways to use spectrophotometric data is Berns’ Principles of Color Technology, 3rd Ed.