The Basics : Blending Techniques
Coloring in a zig-zag motion creates textures.
Coloring in small circles creates evenness.
Color with Super Brush nib in sweeping stroke with first color.
While it is still wet, add second color from the opposite side. Lift the pen up at the end of the stroke.
Go back to the first color and blend the border before drying. Add a lot of ink and really soak it by coloring in circles again.
Two Ways to Express a Boundary Line Between Different Colors
If you apply the dark color first, the lighter color may blur the boundary line between two colors.