How to Deepen the Contrast in Your Acrylic

Elevate your acrylic art with advanced glazing techniques to achieve dramatic contrast and realism

Adding depth and contrast to your acrylic paintings is key to making your artwork pop with realism and vibrance. Because by employing advanced glazing techniques, you can enhance the dynamic range of values and create a compelling sense of depth. So in this post, we will explore how to deepen the contrast in your acrylic work, focusing on the effective use of glazing to build layers, define forms, and emphasize highlights.

What is Acrylic Glazing?

Acrylic glazing involves applying thin, translucent layers of paint to create depth, richness, and contrast in your painting. Because this technique allows the underpainting to show through, adding complexity to the colors and values. And then the glaze is typically made by mixing acrylic paint with a glazing medium, which thins the paint while maintaining its transparency.

Why Use Glazes for Contrast?

Glazing is one of the most effective ways to control contrast in acrylic painting. Instead of directly applying opaque colors, glazes allow you to build up subtle layers that gradually darken or lighten areas, depending on your goals. Then use darker glazes, you can add shadows and deepen contrast without losing the luminosity of the underpainting.

Step-by-Step: Deepening Contrast in an Acrylic Portrait

In this example, we will focus on a portrait painting of Daniel praying, because I will demonstrates how to apply multiple glazes to enhance contrast. And then we will use a combination of ultramarine blue, raw umber dark, and raw sienna to darken the background and make the highlights stand out. So let’s dive into the process.

1. Mixing Your Glaze

To begin, mix your glaze using ultramarine blue, raw umber dark, and raw sienna. This combination will create a deep, neutral tone perfect for adding contrast to the background. For better opacity, you can also add a touch of titanium white to the mix.

Tip: Always test your glaze on a scrap surface or a small section of the painting to ensure you achieve the desired transparency and color balance.

2. Applying the First Glaze

Once your glaze is ready, begin applying it to the background of the painting. Then use a flat-edged brush to smooth out the glaze evenly across the canvas, working in small sections. Think of it as painting a wall, applying consistent strokes to avoid streaking.

Be sure to “cut in” around the edges of the subject—here, Daniel’s hand and fingers. This creates a sharp definition between the background and the illuminated parts of the figure.

Tip: Don’t be afraid to overlap the glaze slightly onto the subject, if necessary, you can always wipe away excess glaze before it dries.

3. Smoothing the Glaze

After applying the glaze, use long, smooth strokes to blend it evenly across the surface. And the this will help eliminate any harsh lines or patches, ensuring a smooth transition between the background and the subject.

Tip: Apply firm pressure as you drag the brush along the contours of the form to ensure the glaze gets embedded into the canvas texture.

4. Adding Warmth Near the Light Source

In areas where light plays a key role, such as around a lamp or a torch in your painting, you’ll want to soften the glaze to allow for translucence. Mix in a little matte medium to dilute the glaze, creating a lighter, more transparent layer.

By using a warmer glaze—such as one mixed with red and yellow—around the light source, you can create the illusion of light emanating from the lamp. This technique will make your painting appear more vibrant and luminous.

5. Emphasizing Shadows on the Subject

Now that the background glaze is complete, you can focus on deepening the shadows on your subject. On Daniel’s face, for example, apply a glaze to the side of his nose, cheeks, and brow, adding depth to his facial features.

Tip: Study your reference photo carefully to observe how light interacts with the subject. In this case, Daniel’s head is tilted slightly backward, causing the light to illuminate the underside of his brow area. This requires a different shading approach than in typical portraits.

6. Maintaining Value Over Color

While color is important, value is even more critical when using glazes. So as you apply darker layers, ensure you leave the highlighted areas open for future glazing. Because this will prevent your painting from becoming muddy and ensure that your highlights maintain their vibrancy.

Tip: Avoid overcomplicating your glazes by adding too many colors at once. Focus on getting the values right first, then gradually build up the color intensity in later layers.

7. Layering and Blending

After adding the first few layers of glazes, assess the overall effect. You should start to see a sense of dimension forming, with contrasts between light and dark areas becoming more pronounced.

Continue building up layers of glaze to deepen the contrast further. For example, on Daniel’s hand, you can use a warmer glaze—like burnt sienna or alizarine crimson—to emphasize the structure and tension of his fingers, which are spread out in prayer.

Tip: Use a small round brush to add fine details, such as the tendons and veins in the hand. This will help convey a sense of movement and emotion in the painting.

8. Restoring Lost Highlights

As you apply darker glazes, you may occasionally lose some of the initial highlights. So do not worry—this can be easily fixed. Because it simply mix some titanium white with a glazing medium and go back over the highlighted areas, restoring the luminosity.

For example, in the area near the lamp, you may need to reapply a light glaze to ensure that the light source maintains its brightness and clarity. Doing this early in the process will save you from having to restore luminosity later, which can be more challenging.

Tips and Techniques for Successful Glazing

• Use Transparent Paints: Glazing works best with transparent pigments. Some good choices include ultramarine blue, raw sienna, and burnt sienna.
• Work in Layers: Glazing is a gradual process. Don’t rush to apply heavy layers. Instead, build up the depth of color and contrast slowly with thin applications.
• Dilute for Control: Use a matte or gloss medium to control the transparency of your glaze. Adding too much water can weaken the adhesive properties of acrylic paint.
• Focus on Value First: Always prioritize value over color when glazing. Ensuring the correct distribution of light and dark areas will make your painting more realistic and dynamic.
• Smooth with Pressure: Apply firm pressure when dragging your brush to ensure smooth transitions, especially in shadow areas.

Deepening the contrast in your acrylic paintings with glazing techniques not only adds depth but also brings life and realism to your artwork. By following these steps, you can effectively use glazes to define sharp edges, enhance shadows, and create glowing highlights. Remember, the key to glazing is patience and precision—each layer builds upon the last, contributing to the overall richness of the painting.

Experiment with different glaze mixtures, values, and pressures to achieve your desired effects, and then watch your painting come alive with contrast and clarity.

This technique of deepening contrast with glazes will transform your approach to acrylic painting. Then offering a powerful tool to create stunning, luminous portraits or any other subject you choose to paint.

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

• How to Paint Foliage Using the Acrylic Glazing Technique
• How to Trace for an Accurate Portrait Sketch
• How to Paint Realistic Eyes in Your Acrylic Portrait
• How to Add Raw Umber Dark & Ultramarine Blue to Your Portrait
• How to Make Your Own Raw Umber Dark
• How to Paint Realistic Trees & Grass in Your Acrylic
• How to Block In Skin Tone Values Using Glazing Technique
• How to Paint Vibrant Reds in Your Acrylic Portrait
• How to Glaze Background Colors & More Acrylic Portrait
• How to Paint White Clothing in Your Acrylic Portrait
• How to Easily Transition from a Sketch to a Painting
• How to Block In Shading & Skin Tones in Your Acrylic
• How to Build Up Color on Acrylic Pet Portrait
• How to Build Up Form on Clothing with Acrylic
• How to Paint Dark Clothing Using Acrylic Glazing Technique
• How to Paint a 24 x 30 Acrylic With 30 People
• How to Do Smooth Shading with Acrylic
• How to Sketch an Acrylic Portrait with a Grid

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

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Thank you so much for taking the time to read this tutorial and watch the video. That means a lot to me.  I hope you find it very helpful in your portrait painting.  

Yours for Better Portraits,

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