Macbeth ColorChecker


The ColorChecker is a checkerboard array of 24 scientifically prepared colored squares in a wide range of colors. Many of these squares represent natural objects of special interest, such as human skin, foliage, and blue sky. These squares are not only the same color as their counterparts, but also reflect light the same way in all parts of the visible spectrum. Due to this unique feature, the squares will match the colors of natural objects under any illumination and with any color reproduction process. Many color management applications will now accept an image of the Macbeth ColorChecker as input from various scanners and from digital cameras.

Quality Control Photographs

These photographs are designed to test the limits of process color printing reproduction, whether by offset printing processes, digital proofing devices or digital presses. These images can be used to check for consistency in the proofing system. These photographs are excellent training tools and can be used to teach new scanner operators to recognize differences between transparencies and they help identify gamut mapping. Each photograph is available in four media: 45” digital duplicate transparencies, 35mm digital duplicate slides, 57 glossy prints, and TIFF files in RGB and CMYK formats at two resolutions on CD for both Macintosh and Windows operating systems.

GATF/Rhem Light Indicator


The GATF/Rhem Light Indicator is a device for the visual control of color viewing. When attached to the border of a color proof or transparency, the Light Indicator will signal whether the viewer is judging color accuracy with or without a 5000K standard light source. Under standard lighting, the Light Indicator appears as a solid magenta patch; under non-standard light sources, the broad stripes of the two magenta metameric colorants that comprise the Indicator are readily apparent.