Each year, the Library of Congress (Library) and its contractors create hundreds of thousands of digital images from documents held in the Library's collections. While a large variety of scanners and software are used by many different operators, the key determinant of image quality is proper exposure. In some form, exposure determines tonality, dynamic range, shadow and highlight detail, “sharpness,” noise, and color accuracy. Accurate exposure is essential so it is somewhat surprising that so little attention has been paid to insuring common exposure calibration and standardization within and across the imaging workflows. This paper describes a new set of image targets with analytical software used to create and evaluate baseline scanner image quality. Then it begins examining the effects various exposure controls have on image quality.