Being transparent, they are compatible with watercolors and look good over layered watercolor washes. If you are going to apply multiple pigment mediums, you must also use a type of paper that can handle these mediums, the pen and ink dynamics, and also wet washes. For example, the pen should be able to glide over the surface without snagging or clogging, and the paper should be absorbent enough to avoid warping when wet washes are applied. For best overall results, use a paper that is pH neutral and has a high rag content. Try using colored paper along with colored inks to extend the tone and range of an illustration.
Textured paper can also greatly affect final appearance.
Hand control is very important as you work with nib-point pens. To produce fine lines, a pen should be held upright and pulled across the paper with light, even pressure. Thicker lines can be created by holding the pen at more of an angle and applying more pressure. This way, the tip of the nib will be splayed further apart and allow more ink to flow over a wider area. Line width is best produced by using different nib points that are designed for precise line width and flow of ink.