To paint with watercolor, start with either wet or dry watercolor paint and mix it with water until it reaches the desired transparency. Because watercolor paint is translucent, it is best to paint lighter colors first, then layer darker colors over them.
Painting with watercolor can be challenging due to the transparent and quick-drying nature of the medium. If a mistake is made in a watercolor painting, it is difficult to cover up or correct. A good way to avoid errors is to test the watercolor on a piece of scrap paper before applying it to the painting.
The precise tone of watercolor paints is easily altered by adding more or less water to the pigment. More water results in a lighter, more translucent shade. If the pigment dries up in the tube it is still usable but may require additional water to soften it.
Watercolor paints are prone to dripping and bleeding. If this effect is not desired, use masking fluid. Masking fluid is a latex-based liquid that the artist may apply to areas of the painting that she wishes to keep free of paint. Once the paint has been applied around the masking fluid, the dried masking fluid is peeled off, leaving behind blank paper or a previously applied layer of paint.