Happy New Year! I've been doing some ink sketching for practice and confidence.
The top drawing was done with Higgins Black Magic ink on Arches cold pressed watercolor paper. I used watercolor paper because I wanted to leave the option open to add color, but Arches cold pressed paper has a great texture for inking. I don't like it if I want the ink lines to reproduce cleanly though, such as with workbook illustrations. The texture really breaks up the lines.
For this bottom set of sketches, the girl on the right was drawn with Higgins Black Magic and the others were done with Higgins Eternal ink. For the black solid, I grabbed my Pentel Pocket Brush Pen. The paper was Canson XL which I like for ink drawing because it has a soft texture and takes both ink lines and watercolor well. It's affordable too.