Do this when you have a sketch that you want to clean up
-sketch freely on one side of a paper (a thin paper will work well, like ones of notebook)
-turn the paper and retrace the sketch with cleaner lines
The result should be the “line art” version, you can now use color pencils, markers to color it, or leave the cleaned up version as is.
Note: the lineart will be the mirrored version of the sketch
