How To Darken Background & Clothing: Acrylic Glazing Technique

Discover the acrylic glazing technique to add depth, richness, and contrast to your portraits by darkening the background and clothing with ease.

One of the challenges portrait artists face is creating a balanced contrast between the subject and the background. Acrylic glazing is an excellent technique for solving this problem, offering the ability to subtly darken elements like the background and clothing while maintaining depth and luminosity. In this tutorial, we’ll explore how to use acrylic glazing to darken the background and clothing in your portraits. Then the key to success in this technique lies in building up light layers of color, allowing the paint to create a rich, oil-like effect that transforms your artwork.

Because at the end of this guide, you’ll be able to create striking contrasts, enhance the mood of your painting, and master acrylic glazing for darker tones.

Materials Needed

To achieve the best results with the acrylic glazing technique, you’ll need the following materials:

• Acrylic paints (ultramarine blue, burnt sienna, raw umber, titanium white, etc.)
• Matte medium (or glazing medium)
• Reference photo
• Various brushes (detail brushes, medium flat brush, and large round brush)
• Palette for mixing
• Water and a clean rag

Understanding Acrylic Glazing

Acrylic glazing is a technique where you mix a small amount of pigment with a large amount of matte medium to create thin, transparent layers of color. Each layer allows light to pass through, giving the painting added depth and richness. This technique mimics the effects of oil painting but with the faster drying time of acrylics, making it a versatile choice for many artists.

In this video, we follow the steps to darken the background and clothing of a 16×20 acrylic portrait of a couple and their cat. The key to achieving a smooth glaze is to ensure your base sketch is solid, allowing the layers to enhance rather than correct the painting.

Step 1: Starting with a Solid Sketch

Before applying glazes, it’s essential to have a strong and accurate sketch. As I have mention, that if you want to make sure that the proportions and likeness are perfect before you begin glazing. Because the foundation is key to a successful final product.

When creating your sketch:

• Focus on achieving correct proportions of your subject.
• Make sure the key areas such as the eyes, nose, and mouth are aligned.
• Use light pencil marks that won’t interfere with the transparency of your glaze.

Step 2: Mixing the First Glaze for the Background

In this painting, the client requested a bluish tone for the background. To create a blue glaze, follow these steps:

1. Mix Ultramarine Blue: Add a small amount of ultramarine blue to your palette.
2. Add Matte Medium: Mix the blue with matte medium until the paint is very translucent. Matte medium is milky white but dries completely clear, allowing the underlying layers to shine through.
3. Apply the Glaze: Using short, choppy brush strokes, begin layering the blue glaze onto the background. This creates a smooth transition between the subject and background, enhancing depth.

One of the advantages of glazing is its flexibility. If the glaze looks too intense, you can always add more matte medium or water to lighten it.

Step 3: Building Up Contrast Between the Subject and Background

After applying the initial glaze, focus on enhancing the contrast between the subject (in this case, the couple and their cat) and the background. This step is crucial to making the subject stand out. You want to:

• Gradually increase the opacity of the glazes on the background to push it further into the distance.
• Use darker tones in the background compared to the foreground to create depth.

To darken the background even more, add layers of raw umber or burnt sienna mixed with matte medium on top of the blue glaze. This will give the background a more muted, shadowy effect while still allowing the initial blue tone to shine through.

Step 4: Glazing the Clothing

Next, shift focus to darkening the clothing using a similar glazing technique. The subject in this portrait is wearing darker-toned clothes, and I use the combination of raw umber and ultramarine blue to darken the clothing in a natural, gradual way.

1. Mix Raw Umber and Blue: Combine raw umber with ultramarine blue and matte medium. This creates a nice neutral dark glaze that adds depth to the clothing without making it look flat.
2. Apply the Glaze: Begin layering this darker glaze on the clothing, focusing on areas of shadow or where more depth is needed.
3. Build Layer by Layer: Since glazing is a cumulative process, each layer adds more intensity to the clothing. Don’t worry about getting the perfect color right away. With each layer, the colors will mix and blend, creating a more realistic tone.

Remember, glazing allows you to make adjustments easily. If the color feels too cool or too warm, add a thin glaze of raw sienna or alizarin crimson to adjust the warmth or coolness.

Step 5: Enhancing Details and Finishing Touches

Once the base glazes are in place, use smaller detail brushes to enhance the finer areas, such as the edges of the clothing or folds in the fabric. For example, I use raw sienna to highlight certain areas of the shirt’s wrinkles. Then this subtle addition of color adds a lifelike quality to the painting.

At this stage, pay attention to:

• Wrinkles and folds in the clothing: Use a small brush to carefully apply thin glazes to highlight these details.
• Edge details: Glaze carefully around the edges where the subject meets the background, ensuring a smooth transition.

Tips for Acrylic Glazing Technique

• Use Light Layers: Always apply thin glazes and build up gradually. Heavy applications will obscure the previous layers.
• Dry Between Layers: Allow each glaze to dry before adding the next. This prevents muddying the colors.
• Experiment with Color: Don’t be afraid to adjust the color temperature with warm or cool glazes.
• Less Is More: A little pigment goes a long way when glazing. Be mindful of how much color you mix in with the medium.
• Work from Light to Dark: Build up your painting by working from lighter glazes to darker ones to maintain luminosity and depth.

Conclusion

The acrylic glazing technique offers artists a powerful tool for adding depth and richness to their paintings. When layering transparent color, you can gradually darken backgrounds and clothing without losing the vibrancy of the initial layers. This method also allows for flexibility, as adjustments can be made throughout the process without the pressure of getting it right on the first try.

In this painting of a couple and their cat, the careful use of glazing brings out the contrast between the subjects and their background, creating a compelling portrait. With practice, you’ll be able to master this technique and apply it to your own projects, transforming your portraits into luminous works of art.

If you’re looking for more instructional videos on how to improve your acrylic painting, visit www.realisticacrylic.com for more tutorials and check out my free courses here. .

LEARN MORE

• Adding highlights to your acrylic painting
• 5 Excellent Reasons to Use Aluminum Foil
• Paint Realistic Wrinkles in Acrylic
• Painting Clothing in an Acrylic Portrait
• Paint a Cloudy Sky Acrylic  
•  How to add Semi-Opaque Highlights
• How to Enhance the Contrast in Your Acrylic
• How to Add Glaze to Your Acrylic Painting
• Paint Realistic Reflections on Eyeglasses in an Acrylic Portrait
• Build Up Depth on Your Acrylic Portrait Backgrounds
• How Do You Do Layers With the Glazing Technique?
• Learn How to Paint Wrinkles in Acrylic

Read more about how to paint a portrait that you can surely be proud of!

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Yours for Better Portraits,

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