When I scan a sketch it comes out pale blue. I have a HP scanner I gave a hundred dollars for about four years ago. So the lamp may be getting weak.
So, what I do is load it in Jasc Paint Shop Pro 7. Then I grayshade the drawing. It is always still paler than my original sketch. So I "Lighten" the contrast once. This darkens some areas and lightens some areas. Some sketches come out with a little more contrast than my original and some come out about like my original sketch. I don't know how to fine tune the contrast, or even if there is a way to fine tune the contrast. It seems to be preset. There is a "Lighter" setting, a "Normal" setting and a "Darker" setting.
So if anyone knows more than I do about Paint Shop Pro 7, you are welcomed to let me know how to get my scans closer to my original sketches.
I have some other paint programs but I know more about Jasc's than any other. Suggestions appreciated.