Standard Machinery Group manufactures 528 Spectro Densitometer. Standard Machinery Group also offers products for the Graphic Arts, Commercial Printers and Publishers etc. 528 Spectro Densitometer is the only hand-held densitometer that measures each color`s unique spectral identity and then converts it into familiar densitometry or colorimetry. This versatility allows communicating variations between a target color and measured samples, or between a proof and a press sheet. It is used to set target densities for both process and non-process color. It even has functions built in for evaluating the paper media.