Extremely random zero defined lines blending

Hi, I just scanned a pencil drawing for the first time, and I relined the pencil markings with black ink, but it's jaggy, do you know how I can make it a smooth black line? Thanks

http://www.rrevolution.net/ss/arm.gif

Try Gaussian blur until it is fuzzy. Then Levels, bringing in the black and white sliders until you have the line thickness you are looking for.

Good luck

Thanks, lines are pretty clean, couple more steps and it'll be set. Thanks again
Edit:
Another way that takes work is to use the poly lasso, and outline around your lines and fill them with black, the results are very smooth, if you would like to spend your time doing it.