Thank you Lovey for visiting my Official Website http://www.momemart.webs.com/ and for posting your question on How do you get a dark background on the image?
A: Make sure you have the top of your Flatbed OFF and the lights in your room are OFF, this will make a dark background. Also, after you scan your images and save, go to your Editing software and do touch-ups if needed. For more dramatic backgrounds you may use: Colored Cellophane pager, Lace, Fabrics, etc...Just play around with it! Let me know when you post any Scanography artwork in your blog!.