1. Lightly sketch out a drawing on a sheet of a paper. Start with something simple like a cube a sphere or an apple like in the sample photos.
2. Tear off a piece of paper towel and crumple it up. Place a few drops of ink on it and dab it on your drawing. Continue doing this to help build up your values. Work from light to dark, so that it is easier to fix any mistakes along the way.
3. Using white gouache or acrylic paint add highlights to your drawing, dabbing it with a paper towel just like you did the inks in step 2.
Here are four brands of alcohol ink bottles to look into that you should get multiple uses out of. All of these are usually $5.00 and under and can be mixed to create other colors.