Evellin wrote:
Traditional media: ink and paper. -Using Prismacolor illustration pens.
Then I upload it, and use Photoshop 6 for coloring
You do what I used to do before I got a wacom tablet.
If you're using the PC to colour, the only way to blacken the lines of a inked drawing is in the scanning. Provided your drawing/inked sketch is clean, before scanning with minimal smudges, and or the lines are dark enough.
I used to scan the image in black and white rather than grayscale or colour. My inked lines would come out black with a clean white background. Although I still had to erase minor smudges and or black specks from badly inked sections. I also had to do basic erasure of some lines that were messy too.
Also, to get nice black lines during the inking stage you need a really steady hand. No shaking and or minimal soaking of the ink into the paper so the ink doesn't blot. You need to be fast too, so the lines are straight or curved without looking shaky too.
You can also to get nice black lines after the scanning process by upping the contrast, and or applying a gausian blur and then fading it out using the multiply layer option. Which I used to do in photoshop.
The tute I used, years ago, to learn to colour in photoshop was this one by artist Peter Keres. The gausian blur step is illustrated in his guide too.
Colouring in Photoshop
~ Pyre