And what is the point of the exercise? If you are going to trace it/ re-draw it in Illustrator, it's utterly moot. The lines could be unicorn pink and yet once traced in AI could be changed to any color your like. You seriously have a wrong understanding of the process. Aside from that simply read up on what Gamma means, how to use color management, how to use adjustments to define black and white points. You are lacking in essential basics and need to read up.
Hi thanks for your reply!
That was where I was originally... Planned to only use illustrator, but was then advised to edit the drawing first to ensure crisp lines for illustrator. As I mentioned I am still new to things and reading up/learning which is why I asked for help (There are peices of wrong advice so thought it was best to check hence the post). I understand and use the process of illustrator but wanted claification with this issue within photoshop but as you have said it isn't relevent or needed to use photoshop as the first step anyway (as I was advised). I've manged to figure it out perfectly and got it sorted, so no issue now, but at the time I wanted some claification so thought I'd ask for it and thought here would be a good palce to get it, thanks for your taking the time to reply!
To begin: the paper stock on which you create the original image is critical. When you draw on an uncoated paper (or worse, a textured paper) the capillary action of the surface fibers absorb the ink and, depending upon fiber length, deliver a line that is not crisp but can easily be seen under a loupe as unevenly feathered. In addition, ink absorption into the sheet reduces the density of the black line.
Next: a scan of that art will produce a line that is neither evenly jet black nor crisp. Drawing on a gloss or semi-gloss coated stock provides the advantage of accepting ink that sits on its surface to produce a more intense black, and may avoid feathering entirely.
Properly created art will have better chance of producing a scan more suited to your purpose and the opportunity, in Photoshop, of allowing you to create a "shape", a vector version more suited to your needs.