I found this way of making the ink pen myself, but that was after searching for a long time.
It was really hard to find, so to make it more easy for you guys i made this
NOTICE: not all versons of sai have Pen tool, you can use the pencil tool for the same effect
!! If you want all the starting brush textures and textures you can download them here : www.deviantart.com/art/sai-def…
(follow her description and pleace thank her as well
IF YOU HAVE A TABLET it can be that the lines get really small then you have to go go and make your pen pressure different intil you like it
fav if it works
and send me links to your art when you used it !