Ink is available in a variety of types, not all of which are suitable for fine-art drawing. Make sure you choose a pigmented lightfast ink, not a dye-based illustrator's ink which fades over time. I prefer a basic 'Indian Ink' which dries waterproof, flows well and doesn't tend to clog. Indian ink can be thinned with distilled water (tap water will make it separate), but I prefer watercolor for washes. Many companies make Indian ink, most of which will be acceptable for drawing.
1. Winsor and Newton Black Indian Ink
Water-resistant offering a solid glossy black. The manufacturer says it has a 'bluish undertone' when thinned but I found it rather neutral.
2. Winsor and Newton Black Liquid Indian Ink
What a confusing name. The French label identifies this ink more correctly as Encre de Chine - Chinese ink. This non-waterproof ink is made from Chinese ink sticks and has a brown undertone. A more watery consistency than true Indian ink, the pen doesn't hold as much, and it bleeds more on fibrous paper. It has a beautiful warm tone.
3. Pigmented Colored Inks
Brands include Dr Ph Martin's Bombay India Inks, and Art Spectrum's pigmented inks, Daler-Rowney Acrylic Artist's Ink and Winsor and Newton Liquid Acrylic Color (I'm not sure about Speedball - check the label). Not to be confused with the dye-based, non-lightfast illustrators colors that they may also manufacture. Composition and handling will varies depending on the vehicle - consider purchasing one or two colors to try before you splash out on a big set.
Click the link to go to Evan Lindquist's collection of old-fashioned ink recipes. Take note of his safety warning - some of them are dangerous! I'm not too sure why you would bother, given that commercial inks are so reliable, but there are always a few loonies who enjoy doing things the hard way. Ideal for history-reenactment fans who are looking for authenticity.
5. Chinese Ink Sticks
Chinese ink sticks are available in attractive sets with a grinding-stone and chinese brush, or on their own. The best offer a deep, rich blue-black and beautiful soft washes. A bit of effort is required to get enough ink for use with a pen - these are intended for brush painting.
