The TIFF images are not post-processed. The goal is to create a digital archival master file that reproduces the original as closely as possible. During the quality assurance process, the TIFF images are inspected for orientation, sharpness, color, contrast, noise, and dust. Images failing this inspection (images that are skewed, out of focus, over- or underexposed, show digital noise, dirt, or dust) have to be rescanned. Access copies for web delivery are created either in the JPEG2000 or PDF format. JPEG2000 is a format that has an efficient compression rate allowing for the online delivery of high-resolution images into which users can zoom to appreciate fine details. This format works well with illustrated children’s books, rare books and oversize materials as well as photographs. At the maximum zoom level, the full resolution and detail of the JPEG2000 image can be appreciated.