I have CS6 extended and I would like to know how to achieve this "smooth" but bold black lines and whenever I try to color hair it doesn't come like I want, mostly with characters with dark hair.




(icon credits to http://phonographs.dreamwidth.org/)
The manga artist does color their hair dark to show they have dark hair and when I try to color their hair (for example, with brown or dark-blueish colors) it barely shows because of the original dark part.
What should I do?