A canvas can carry animal ingredients before any paint touches it. Traditional canvas preparation seals the cloth with rabbit-skin glue, and traditional gesso mixes that same glue with chalk. Golden Artist Colors describes rabbit-skin glue as "refined rabbit collagen". Modern acrylic gesso and synthetic sizing contain no hide glue, and most pre-primed canvas sold today is acrylic primed, though only the manufacturer can confirm that for a specific product.
This page walks through each layer of a prepared canvas, explains where the animal ingredients sit, and shows what to ask before you buy. It is part of our wider vegan art guide.
Key takeaways
- Traditional gesso and traditional canvas sizing both use rabbit-skin glue, which Golden Artist Colors describes as refined rabbit collagen.
- Modern acrylic gesso is bound with a synthetic polymer and, according to Golden, its acrylic gesso and sizing products are synthetic.
- Golden sells GAC 400, a synthetic acrylic product the maker describes as a fabric stiffener, which can seal raw canvas in place of hide glue.
- The cloth itself, whether cotton, linen, or hemp, is plant fibre, so the vegan question sits in the preparation layers, not the fabric.
- Most pre-primed canvas is acrylic primed, but the maker's own product information is the only way to confirm it for a specific canvas.
The three layers of a prepared canvas
A stretched canvas ready for paint is really three things. First comes the cloth, woven from cotton, linen, or hemp. All three are plant fibres, and you can read more about them in our guide to canvas fibres. Second comes the sizing, a thin sealing layer that soaks into the cloth. Sizing stops oil paint from reaching the fibres, where the oil would slowly weaken them. Third comes the ground, usually called gesso, which gives the paint a bright and evenly absorbent surface to hold on to.
The fabric raises no vegan question. The sizing and the ground do, because the traditional versions of both were made with animal glue. A viewer can never see these layers in a finished painting, which is exactly why they are easy to miss.
Rabbit-skin glue: the traditional sizing and gesso
For centuries, painters sealed canvas with rabbit-skin glue, a hide glue that Golden describes as refined rabbit collagen. The same glue is the binder in traditional gesso, where it is mixed with chalk and brushed on in warm layers. Traditional gesso of this kind is still used on wooden panels for egg tempera and gilding, and some oil painters still size their canvas with hide glue because they trust how it behaves.
So when the word gesso appears in a classical technique book, it usually means the animal-glue version. A canvas prepared this way contains animal material in its foundation even if every colour on top is vegan. The paint layers have their own pages: see is oil paint vegan for the medium most linked with traditional canvas preparation.
The modern route: acrylic gesso and synthetic sizing
Most gesso sold today is not the traditional recipe at all. Modern acrylic gesso is built on a synthetic acrylic polymer, and Golden states that its acrylic gesso and its acrylic sizing products are synthetic. For sealing raw canvas, Golden sells GAC 400, an acrylic product the maker describes as a fabric stiffener. An artist who wants a fully plant-and-synthetic support can buy plant-fibre cloth, seal it with an acrylic sizing, and prime it with acrylic gesso, with no hide glue at any step.
One honest note. A synthetic binder means the product is animal free by formulation, but a finished product can contain many small additives. If a confirmed vegan product matters to you, ask the manufacturer about the exact product rather than relying on the word acrylic alone. The same logic applies to the paint that goes on top, which we cover in is acrylic paint vegan.
Pre-primed canvas: usually acrylic, but confirm
Nearly every stretched canvas in an art supply store comes pre-primed. Most of this priming is acrylic, and canvas labelled universal primed is generally acrylic primed. Oil-primed and glue-sized linen is still made for traditional painters, and it is normally labelled as such. Because the sizing is invisible under the primer, the maker's product information is the only way to know what a given canvas carries. Formulations change over time as well, so check the maker's current information rather than an old forum post.
| Layer |
Traditional version |
Animal ingredient? |
Animal-free version |
| Fabric |
Cotton, linen, or hemp cloth |
No, all three are plant fibres |
The same cloth, unchanged |
| Sizing |
Rabbit-skin glue |
Yes |
Acrylic sizing, such as GAC 400, described by Golden as synthetic |
| Ground (gesso) |
Rabbit-skin glue mixed with chalk |
Yes |
Acrylic gesso, bound with a synthetic polymer |
| Pre-primed canvas |
Oil-primed or glue-sized linen |
Sometimes |
Most modern canvas is acrylic primed; confirm with the maker |
What this means when you buy a finished painting
Once a painting is done, you cannot see the sizing or the ground, and many artists buy pre-primed canvas without knowing its full preparation history themselves. The practical step is to ask. VanArtHub sells original paintings by living artists and has not audited every artist's materials, so we do not label any work vegan. What we will do is put the materials question directly to the artist before you buy, so you decide with real information. Our guide on how to verify vegan art lists the exact questions worth asking, about the canvas as well as the paint.
Common questions
Does all canvas contain rabbit-skin glue?
No. Rabbit-skin glue appears in traditionally prepared canvas, where it works as sizing and as the binder in traditional gesso. Most canvas sold today is sealed and primed with synthetic acrylic products instead. The only way to be sure about a specific canvas is to check the manufacturer's product information.
Is acrylic gesso vegan?
Acrylic gesso is bound with a synthetic polymer and contains no hide glue, and Golden states that its acrylic gesso and sizing products are synthetic. A formal vegan claim still has to come from the maker of the specific product, because small additives vary between products. If it matters to you, ask the manufacturer directly.
How do I know if a pre-primed canvas is acrylic primed?
Read the product description or ask the maker. Most pre-primed canvas today is acrylic primed, and oil-primed or glue-sized linen is normally labelled for traditional painters. If the listing does not say, contact the manufacturer, because the sizing layer is invisible once the canvas is primed.
Can a canvas be prepared with no animal products at all?
Yes. Cotton, linen, and hemp are all plant fibres. An artist can seal the cloth with a synthetic acrylic sizing such as Golden's GAC 400, which the maker describes as a fabric stiffener, and then prime it with acrylic gesso. That gives a complete preparation with no hide glue at any step.
Is the gesso on wooden panels also made from animal glue?
Traditional panel gesso is, yes. It is chalk bound with a hide glue such as rabbit-skin glue, and it is still used for egg tempera and gilding. Modern acrylic primers for panels are synthetic. As with canvas, the maker's information for the specific product is the way to confirm.
Ready to look at real work? Browse our acrylic paintings, or start with the full range of original paintings, and send us the materials question for any piece that interests you.
