My scanning tip. Quite often, when scanning or photo-copying thin pages with printing on both sides, the printing on the back side bleeds through the paper into your copy. This problem occurs because the white backing on the scanner lid allows light, which has passed through the paper, to reflect back through the paper a second time taking the information on the back side with it. A piece of black paper taped to the white backing on the scanner lid will prevent this secondary reflection from taking place. The result is no bleed through.