Ink doesn’t just come from India or from a squid. The best inks are pigmented – same as a paint – and therefore lightfast.
Drawing inks can be brushed onto paper or in some cases applied with a technical pen, or through a nib dipped in the bottle (for the adventurous a quill feather will also work).
Acrylic inks are like drawing and caligraphy inks but can also be mixed with acrylic paints. They are similar to a fluid acrylic, but even more watery. The particle size is relatively small and these inks can be fed through most technical pens or airbrushes without clogging, as long the tip or nozzle is cleaned thoroughly after every use.