This panel uses 2B pencil, a Blackwing Matte pencil, and ink. Can you spot what is ink and what is pencil. A clue would be in the thinness of the line. I am still experimenting and learning how to sharpen and use pencils (of all types) with very fine points. "B" lead is softer and darker. "B" pencils are picked up better than "H" pencils by the scanner (like ink), but "B" lead, being softer, is more labor intensive to establish and maintain a very fine point. "H" lead is great for a razor sharp point...but it is often far to light to be picked up in a scan.
Of course, "HB" lead plays a role...but it usually only serves me in an early stage. I have been sketching with a combination with non-photo blue and "HB"...then going over in "2B", Blackwing, and ink.