To prevent bleed through from the printing on the backside of the page, place a black sheet of paper behind the page you are scanning. I never use a de-screening filter as this only blurs the image. I scan at 300 ppi at 100% of the actual size and then change the size of the scan to be slightly smaller physically but retain the 300 ppi aspect. I always save the image as a JPEG without any compression-- always maximum quality (12) and the "baseline" setting in Photoshop. I always see a lot of images available here with too much compression because some people don't know any better.
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