Is It Possible to Paint Over a Pencil Sketch with Watercolours if Fixative is Applied?

Yes, you can paint over a pencil sketch with watercolours even if fixative has been applied, but there are a few important factors to consider. This article will guide you through the process to achieve the best possible results.

Understanding Fixative Types

Firstly, it's crucial to understand the type of fixative used. Workable fixative allows for some blending of watercolours, which can be beneficial for achieving a smooth transition. In contrast, permanent fixative creates a barrier that may prevent watercolours from adhering well. Always choose the appropriate fixative for your sketch.

Watercolor Application Techniques

When applying watercolours over a fixed pencil sketch, it's important to use light washes initially. Heavy applications of watercolours can potentially lift the pencil lines, especially if the fixative is not strong enough. This technique ensures that the pencil sketch remains intact while allowing for the gradual build-up of color.

Testing the Compatibility

Before embarking on your full painting project, it's advisable to test the fixative on a small area or a separate piece of paper. This will give you an idea of how the fixative interacts with the watercolours. If the fixative is water-soluble, you might need to spray a workable fixative before painting to ensure the paper can still absorb the watercolours.

Layering for Gradual Effect

To achieve the desired effect without disturbing the pencil sketch, use the layering technique. Gradually build up layers of color. This method helps in minimizing the impact on the existing pencil sketch while allowing you to add your watercolour designs seamlessly.

Choosing the Right Fixative

Hairspray is not an ideal fixative for watercolour paintings. It contains conditioners and lacquers that may not be compatible with watercolours and can seal the paper, preventing it from absorbing the watercolours. Opt for a workable fixative designed for art, as it is more compatible with watercolours and ensures a better adhesion of watercolours.

While workable fixatives are typically priced similarly to high-quality hair sprays, they are specifically formulated to work with watercolour media. Therefore, investing in a product designed for artists will yield better results in your painting project.

Conclusion

Painting over a pencil sketch with watercolours, even when fixative is involved, is certainly possible. However, it's essential to ensure that the fixative is compatible with watercolours to prevent any adverse reactions. Experimenting on a small section first and using a workable fixative will help you achieve the best results. Happy painting!

Related Resources

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