🌈 Staining vs Non-Staining Watercolors

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🌈 Understanding Staining in Watercolor

As you explore watercolor, you'll soon discover that some colors become almost permanent once they dry, while others can be softened or even removed with clean water. This characteristic is known as staining, and understanding it will help you choose the right pigments for different painting techniques.

What Is Staining?

Staining is simply a property of the pigment that influences how it behaves on the paper. It refers to how strongly a pigment bonds with the paper fibers. Highly staining pigments penetrate deeply into the paper, making them difficult to lift or remove after drying. Non-staining pigments remain closer to the surface and can often be reactivated or lifted with water. The level of staining varies from pigment to pigment, which is why two colors that appear similar may behave very differently once applied.

Why Does Staining Happen?

Staining depends largely on the size and composition of the pigment particles. Many modern synthetic pigments contain extremely fine particles that are carried deep into the paper fibers by the water. Once dry, these pigments become firmly anchored and resist lifting.

Traditional mineral and earth pigments often have larger particles that remain closer to the paper's surface, making them easier to remove or soften. The amount of staining can also be influenced by:

• The type of watercolor paper

• How absorbent the paper is

• The amount of water used

• How long the paint has been allowed to dry

Highly Staining Pigments

Highly staining pigments are excellent when you want rich, permanent color that remains undisturbed by additional layers of paint. These pigments retain their brilliance even after multiple layers are applied. They are especially useful for:

• Strong, permanent washes

• Glazing and layering

• Deep shadows

• Bold, saturated color

• Vibrant floral and botanical paintings

• Subjects that require clean, crisp edges

Common highly staining pigments include:

• Phthalo Blue (PB15)

• Phthalo Green (PG7)

• Quinacridone Magenta (PR122)

• Quinacridone Rose (PV19)

• Indanthrone Blue (PB60)

Non-Staining Pigments

Non-staining pigments sit closer to the surface of the paper and are much easier to lift after drying. Many traditional earth colors fall into this category. These pigments offer greater flexibility if you like to adjust your painting as you work. They are particularly useful for:

• Soft corrections

• Lifting highlights

• Gentle blending

• Atmospheric effects

• Portrait work

• Mist, clouds, and soft backgrounds

Examples of less staining pigments include:

• Burnt Sienna (PBr7)

• Raw Umber (PBr7)

• Yellow Ochre (PY43)

• Ultramarine Blue (PB29)

When to Choose Staining Colors

Highly staining pigments are ideal when you want confidence that earlier layers will remain undisturbed. They are often the preferred choice for glazing techniques because fresh washes can be applied over dry paint without significantly lifting the underlying color.

Many artists also appreciate their vibrant intensity and excellent lightfastness.

When to Choose Non-Staining Colors

Non-staining pigments are often preferred when flexibility is important. Because they can be softened or lifted after drying, they're especially useful for creating highlights, making subtle corrections, and developing soft transitions. They're also excellent for artists who enjoy a looser, more forgiving painting process.

Staining Isn't Permanent in Every Situation

Although highly staining pigments are much more difficult to remove, "staining" doesn't always mean impossible to lift. The paper surface, drying time, and painting technique all affect how much paint can be removed. Likewise, even non-staining pigments become harder to lift if they have dried for a long time or have been layered repeatedly.

Choosing the Right Pigment

Most watercolor manufacturers indicate a pigment's staining strength on their color charts or swatch cards. Becoming familiar with these ratings helps you select paints that suit your preferred techniques.

If you enjoy glazing and vibrant color, highly staining pigments are excellent choices. If you frequently lift highlights or make adjustments while painting, non-staining pigments may be a better fit. Consider including both types of pigments in your palette, using each where its unique properties offer the greatest advantage.

🌈 Closing Thought

Staining is one of watercolor's most important pigment characteristics. Rather than judging a color by how easily it lifts, think about how its behavior can support your creative goals. By understanding staining strength, you'll make more informed pigment choices and gain greater confidence in planning washes, layering colors, and developing your paintings.

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