Bistre is made by soaking or boiling soot in water until the soluble tar is extracted. The solution is then strained and evaporated, with a rich brown liquid remaining. A gum binder may be added to improve quality. Though brown, bistre is quite transparent and does not appear in extremely dark values. Adding water will produce lighter values.

Techniques: Two types of brushes are used to create wash drawings:

- Soft-haired Brushes, used to apply thin washes
- Bristle Brushes, used to create dry-brush effects as well as darker or firmer lines.

One method is to use a soft-haired brush to create the effect of light and shadow in a purely suggestive fashion with a bristle brush used to delineate edges and darker areas.

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