A photographic tool, chart, grid, or electronic instrument used to determine the correct colour filtration when making colour prints. It helps photographers and darkroom technicians identify and adjust the balance of primary colours-red, green, and blue-to achieve accurate tonal reproduction and neutral colour tones in the final print. Analyzers are particularly important in colour printing and processing, where precise filtration ensures consistent results, proper exposure, and faithful reproduction of the original scene. Understanding how to use an analyzer allows photographers to control colour accuracy and enhance the quality of both black-and-white and colour photographic prints.