Flatbed scanners for office purposes are limited to detection in the visible region. They provide uniform illumination with white light, fast scanning, high optical resolution, and produce an image of the plate in a convenient form for storage or manipulation[72–75]. Free or inexpensive software is available for converting the stored image into chromatographic information (for example,Sorbfil, Just TLC, Biostep, Image J, etc.) [76]. The scan data is stored as a set of RGB values (red 600–750 nm, green 520–565 nm and blue425–450 nm) in separate channels. Software evaluation then uses data collected in any channel, or combination of channels, defined as a grey scale.