i did notice that the black was a little thinker. what kinda nib are you using?
I can't remember for sure, but it's just a cheap speedball nib... I don't really like it because it's so big my hand is too far away from the paper. Or it might be the pen holder, I don't know. I can't control it. I'm just experimenting. I'm still learning how to draw!
I love learning about an artist's process. Thanks for the inside dope.