After you’ve taken a fingerprint using one of the methods describe in the previous tutorials in the series:

You might have identified a few areas that need some cleaning up. In this tutorial I’ll show you how I go about this using Adobe Photoshop. Even if you are not very comfortable using this massive program, following along step by step, pausing the video if you need to, will get you there.

If you don’t have access to Photoshop there are free image editors you can use online and in my next tutorials I’ll show you how to use a couple of them.

The resulting print should be clean, pure black & white, have no gray areas anywhere and have clearly defined whorls.