Perhaps the most important task in the production process of any line art for print is the art of scanning. A bad scan can adversely affect every aspect of the job that follows, and usually the only correction is to start over from scratch. A scanner is an extremely precise reproduction tool; but beware, that same precision can prove to be a double edged sword.
Digital Prepress for Comic Books not only discusses scanning, but also why some types of inking reproduce better than others. And why higher resolution scanning is not always the answer to better reproduction of art. Below is an excerpt dealing with changing the resolution of a scan, also referred to as resampling..