Gesso in art is a primer used to prepare canvas, wood, paper, and other surfaces for painting. It creates a ground with controlled absorbency and a slightly textured finish that helps paint adhere. Most artists today use acrylic gesso, a water-based preparation that dries to a matte surface and can be used beneath acrylic or oil paints when the support is prepared correctly.
Gesso might look like ordinary white paint in the container, but it serves a different purpose. It’s the layer between the material you’re painting on and the paint itself.
I think the easiest way to understand gesso is through the surface it creates. A brush behaves differently on raw canvas, smooth wood, and primed board. The amount of texture and absorbency determines how easily the paint moves, how much sinks into the surface, and how the first marks appear.
Here is what gesso does, which types artists use, when it’s necessary, and how to prepare a surface without making the process more complicated than it needs to be.
What Is Gesso Made Of?
Most modern artist gesso is an acrylic-based ground containing three main components:
- Acrylic polymer binder: Holds the ingredients together and forms a film as the ground dries.
- Pigment: Usually a white pigment such as titanium dioxide, which gives ordinary white gesso its color and opacity.
- Mineral fillers: Materials such as calcium carbonate that contribute to the ground’s absorbency, texture, and matte finish.
Manufacturers adjust these ingredients to produce grounds with different levels of tooth, flexibility, opacity, and absorbency.
Traditional gesso is a different material. Historically, artists prepared rigid wooden panels using animal glue and mineral materials such as chalk or gypsum. That traditional ground could be refined to create an exceptionally smooth painting surface.
Modern acrylic gesso is more flexible and generally easier to use. When an art supply store sells a bottle labeled simply “gesso,” it is usually referring to an acrylic preparation, not traditional glue-based gesso.
What Is Gesso Used For in Painting?
Artists use gesso to control the relationship between the support and the paint. A good ground can make painting more consistent, particularly when the underlying material is very absorbent or has an unsuitable texture.
| Purpose | What gesso does |
|---|---|
| Preparing a painting surface | Creates a workable ground over a suitable support |
| Controlling absorbency | Changes how quickly paint and its vehicle penetrate or interact with the surface |
| Improving adhesion | Provides tooth and a compatible surface for subsequent paint layers |
| Changing surface texture | Can produce a smoother or more visibly textured working surface |
| Creating a starting color | Provides a white, black, gray, clear, or tinted ground |
| Preparing for drawing | Can provide a toothy surface for graphite, charcoal, and other compatible dry media |
I find the effect of surface texture particularly important in drawing and painting. A fine line feels different on a smooth panel than on rough canvas. Dry marks pick up surface irregularities, while wet paint responds to absorbency and the texture left by the primer.
For a more detailed explanation of how texture affects drawing materials, see my guide to tooth in drawing paper.
Types of Gesso: White, Black, Clear, and Colored
Gesso doesn’t have to be white. Different grounds allow artists to begin with different colors and surface effects.
White gesso
White acrylic gesso is the standard option. It creates a light, relatively opaque ground that can be useful beneath transparent or opaque paint.
White is a practical choice when I want the lightness of the support to remain part of the painting process. Thin colors can appear brighter over a white ground than over a dark one.
Black gesso
Black gesso prepares the surface while providing a dark starting color.
This can be especially interesting when painting with opaque light colors or leaving portions of the dark ground visible between brushstrokes.
Rather than building every dark area from the first brushstroke, the painting begins with an established dark value.
Clear gesso
Clear gesso is designed to leave more of the support’s underlying appearance visible while adding a painting or drawing ground.
For example, an artist might use clear gesso on a suitable wooden support to preserve the visible grain or on a toned surface where the original color is important.
Clear doesn’t necessarily mean completely invisible. Some products contain aggregates that create noticeable tooth or a slightly cloudy appearance, especially when applied thickly.
Gray and tinted gesso
A gray or colored ground can establish a middle value before drawing or painting begins.
I like the principle of working from a middle value because it allows light and dark marks to develop in relation to something other than pure white.
You can purchase pre-tinted gesso or tint certain acrylic grounds with compatible acrylic paint. Follow the manufacturer’s instructions so the mixture retains suitable ground properties.
Liquitex’s range of artist gessoes provides examples of white, black, gray, clear, and textured acrylic grounds.
Do You Need Gesso Before Painting?
Not every painting surface needs an additional coat of gesso. The answer depends on whether the support is already prepared, what paint you’re using, and whether the existing surface is suitable.
| Surface and medium | Is gesso necessary? |
|---|---|
| Pre-primed canvas with acrylic | Usually no additional coat required if the existing ground is suitable |
| Raw canvas with acrylic | Often recommended for controlling absorbency and preparing a consistent painting ground |
| Raw canvas with oil paint | Requires an appropriate protective preparation; follow a complete oil-compatible sizing and priming system |
| Wood panel with acrylic | Often useful, with surface preparation appropriate to the panel |
| Heavy drawing paper with acrylic | Optional, depending on the desired absorbency and texture |
| Watercolor paper with watercolor | Normally unnecessary and generally not desirable for traditional watercolor handling |
| Mixed-media paper with drawing materials | Optional when a different surface texture is wanted |
For a store-bought canvas labeled acrylic-primed, I would first inspect the existing ground. If the surface is uniform and appropriate for the painting, there may be no reason to add more gesso.
For raw fabric intended for oil painting, proper preparation matters much more. Oil can damage certain natural support fibers over time, and a single casually applied primer coat isn’t necessarily sufficient protection.
GOLDEN Artist Colors provides detailed painting-support preparation guidance, including different systems for acrylic and oil painting.
Can You Use Acrylic Gesso Under Oil Paint?
Yes. Many modern acrylic gesso products are compatible with oil paints once properly applied and dried.
However, the number of coats, drying time, and any additional sizing requirements depend on the support and product.
GOLDEN recommends at least three coats of its acrylic gesso for controlling the penetration of oil into canvas. Liquitex recommends two to four coats of its Basics Gesso when the ground will be used beneath oils.
Those are product-specific instructions rather than a universal rule for every brand or support.
For finished oil paintings, I would consult the manufacturer’s complete preparation system rather than assume that any white primer provides sufficient protection.
The GOLDEN technical information on acrylic gesso explains its use beneath oil paints.
Can You Use Gesso on Paper?
Yes. Gesso can turn sufficiently sturdy paper into a primed surface for acrylic, drawing, and mixed media.
It changes the paper rather than simply strengthening its existing properties. Once a layer of gesso covers the sheet, you’re working on the ground, not directly on the original paper surface.
For drawing, this can provide additional tooth or an opaque ground over an old sketch. For acrylic painting, it can help create a more consistent surface.
However, gesso contains water, so applying it to thin paper can cause curling, rippling, or buckling. Heavier paper generally handles preparation better than lightweight sheets, though the result also depends on the paper and coating.
I would test the gesso on a small piece of paper before coating a finished drawing or an entire sketchbook.
For the actual application process, see how to gesso paper.
If you’re specifically working with watercolor paper, my gesso on watercolor paper guide explains why a normal acrylic ground changes the behavior of watercolor washes.
How to Apply Gesso to a Painting Surface
Applying gesso is relatively straightforward, although the correct preparation depends on the support and painting medium.
For a suitable acrylic painting support, this is the basic approach I would follow.
- Check the surface. Make sure the canvas, panel, or paper is clean, dry, stable, and compatible with the ground. Some supports require additional sizing, sealing, or other preparation.
- Stir the gesso. Mix the material until its consistency is even. Follow the manufacturer’s directions for thinning rather than adding water arbitrarily.
- Apply an even coat. Use a suitable wide brush or roller. Spread the ground without leaving unwanted puddles or heavy ridges.
- Allow it to dry. Follow the stated drying time for the product, support, and intended paint medium.
- Inspect the coverage. Check for uneven patches or unwanted texture. Apply another coat if recommended or needed for the intended surface.
- Let the prepared surface become ready for painting. Drying and curing requirements vary, especially when the ground will be used under oil paint.
For an acrylic study, I would generally favor an even, controlled surface over a thick application unless the gesso’s visible texture is an intentional part of the artwork.
For more demanding archival work or oil painting, I would follow the specific manufacturer’s support-preparation instructions instead of treating this simple process as a complete technical specification.
How Many Coats of Gesso Should You Use?
There isn’t one number that applies to every painting surface.
An additional coat on an already primed acrylic canvas is a different situation from preparing raw fabric for oil painting.
For ordinary acrylic work, I would look for adequate and even coverage with a surface texture suited to the painting. Adding more coats isn’t automatically better.
For oil painting, the correct number of coats may be greater because the preparation also needs to prevent harmful penetration of the paint’s oil vehicle into vulnerable support materials.
For example, Liquitex Basics Gesso recommends two to four coats for oil painting. Follow the instructions of the gesso you’re actually using.
How Long Does Gesso Take to Dry?
Acrylic gesso may become dry to the touch relatively quickly, especially in thin coats, but that doesn’t necessarily mean the surface is ready for every kind of painting.
Drying time depends on thickness, temperature, humidity, airflow, and the particular formulation.
Liquitex advises allowing its Basics Gesso to dry for at least 24 hours before beginning to paint. GOLDEN recommends a longer drying period for certain acrylic ground systems beneath oil paint, with additional time supporting maximum adhesion.
I would check the instructions on the container rather than rely on the appearance of the surface alone.
If the coating feels tacky, soft, or gummy, it isn’t ready for additional work.
Is Gesso the Same as White Acrylic Paint?
No. Although white acrylic gesso and white acrylic paint may look similar when wet, they’re formulated for different purposes.
Acrylic gesso is intended to create a ground with suitable absorbency, adhesion, and texture. White acrylic paint is formulated primarily to produce a paint layer with its own color, opacity, and handling characteristics.
White paint may create a white surface, but that doesn’t automatically give it the same qualities as a suitable primer.
I wouldn’t substitute ordinary acrylic paint for a tested gesso preparation when the durability and long-term stability of the painting matter.
Gesso vs. Primer: What’s the Difference?
In everyday painting language, acrylic gesso is a type of artist’s primer. The word primer describes its function, while gesso refers to a particular category of painting ground.
However, not all primers are artist gesso.
Wall and furniture primers may be designed for architectural coatings, stain blocking, or adhesion to building materials. Their flexibility, absorbency, aging behavior, and compatibility with fine art paint are not necessarily the same as those of an artist’s ground.
For a temporary experiment, artists sometimes investigate unconventional materials. But for finished artwork I intend to preserve, I would choose a ground with documented suitability for the support and painting medium.
Should You Sand Gesso Before Painting?
Only if you need a smoother surface and the particular ground is suitable for sanding.
For detailed drawing or a painting requiring extremely controlled edges, a smoother ground may make the process easier. For expressive acrylic work, I may want the brush texture to remain visible.
Instead of automatically sanding every coat, I would first experiment with a smoother application technique using a wide brush or appropriate roller.
If sanding is necessary, follow the manufacturer’s instructions and control the resulting dust. Dried coatings may contain fine particulate fillers and pigments, so dry sanding without suitable ventilation, dust collection, and respiratory protection is not a good default practice.
Also, specialty grounds designed for sanding may not be suitable for flexible canvas. A hard, highly sandable ground may be better suited to a rigid panel.
Common Problems When Using Gesso
If a primed surface doesn’t behave as expected, I would examine the ground itself before assuming the paint is the problem.
| Problem | Possible cause | What to check |
|---|---|---|
| Paint looks dull or sinks in | Ground is more absorbent than intended | Product properties and preparation system |
| Visible brush ridges | Thick application or brush texture | Coating thickness and application tool |
| Ground peels or separates | Unsuitable, dirty, slick, or poorly prepared support | Adhesion and manufacturer compatibility instructions |
| Paper curls or buckles | Moisture introduced by wet ground | Paper strength, support, and drying method |
| Clear gesso looks cloudy | Application thickness or product characteristics | Coating method and product guidance |
| Surface feels too rough | Ground texture or aggregates | Product choice and whether a smoother ground is appropriate |
Gesso can’t turn every material into a reliable long-term painting support. Flexible, glossy, oily, dusty, or unstable materials may require a different preparation or may be unsuitable for a particular medium.
For important artwork, a small adhesion and handling test is worthwhile before committing to the final surface.
A Simple Experiment to Understand Gesso
If you’re new to gesso, I’d learn what it does by comparing the same paint on two or three different surfaces.
Use a suitable sturdy support and prepare separate areas according to the material manufacturer’s instructions. For example, you could compare an already prepared acrylic-painting surface with another area receiving an additional coat of compatible gesso.
Once the surfaces are ready, apply the same acrylic paint mixture to each.
Pay attention to:
- How readily the paint spreads under the brush.
- Whether the surface grabs or releases the brush.
- How visible the underlying texture remains.
- Whether the color appears different after drying.
- How easily you can create sharp edges or drybrush marks.
This reveals why the ground matters before you begin making a finished painting.
I’d also try a few graphite or charcoal marks on a properly dried sample. The difference in tooth can be useful for artists who move between drawing and painting.
Frequently Asked Questions About Gesso
What does gesso do to a canvas?
Gesso creates a prepared painting ground on the canvas. It changes the surface’s absorbency and texture, provides a suitable base for compatible paint, and helps establish consistent handling. The full preparation required depends on whether you’re painting with acrylics or oils.
Do you let gesso dry before painting?
Yes. Acrylic gesso must be allowed to dry adequately before painting over it. Required drying times vary by product and painting medium, and an oil-painting preparation may require longer than a basic acrylic study. Follow the manufacturer instructions.
Is gesso waterproof when dry?
Dried acrylic gesso forms a water-resistant acrylic film, but it shouldn’t automatically be treated as a completely waterproof barrier or universal sealant. Its absorbency and permeability vary by formulation, coating thickness, and support.
Can you draw on top of gesso?
Yes. Properly dried gesso can provide a suitable surface for graphite, charcoal, and other compatible drawing materials. The amount of tooth determines how the marks behave, so a test is useful when making detailed work.
Can you use gesso on watercolor paper?
Yes, but gesso changes the watercolor paper’s surface. It can be useful for acrylic and mixed-media work, while traditional transparent watercolor may behave differently. See my guide to using gesso on watercolor paper for more detail.
Do all canvases need gesso?
No. Many commercially prepared canvases already have an appropriate primer and are ready to paint. Raw canvas, particularly for oil painting, requires more consideration. Check the canvas preparation and paint compatibility before adding or omitting a ground.
What is the difference between traditional gesso and acrylic gesso?
Traditional gesso generally uses an animal-glue binder with chalk or gypsum and is associated with rigid painting supports. Modern acrylic gesso uses a synthetic acrylic binder and is available in flexible formulations suitable for many contemporary supports.
Choosing Gesso for Your Next Painting
If I were buying my first gesso for acrylic painting, I would start with a standard white artist-grade acrylic gesso from a manufacturer that provides clear preparation instructions.
For a dark starting surface, I would consider black gesso. For work where the underlying material should remain visible, clear gesso may be more appropriate. For oil painting, I would choose a tested preparation system designed for the support and paint.
The important thing is not simply whether the surface looks primed. It’s whether the ground gives the paint the absorbency, adhesion, and texture the artwork needs.
Once you understand that relationship, gesso becomes less of a mysterious extra material and more of a practical decision about how you want the painting surface to behave.
For the next step, see how to gesso paper if you’re preparing a drawing or mixed-media surface, or gesso on watercolor paper if you’re experimenting with watercolor supports.