Types of Canvas: Cotton, Linen and How They Are Stretched

What determines a painting's lifespan is usually not the paint but the surface beneath it. Good paint cracks over the years on a poor canvas; a well-prepared canvas carries even mid-grade paint.

This article is for both the person buying canvas and the person buying a painting. Little is written for the second, yet it matters: knowing how to look at the back of a piece makes a difference over time.

Cotton and linen#

The great majority of canvas is one of these two fibres.

Cotton is the most common. Cheaper, lighter in colour, with a more regular weave. Its near-smooth surface suits fine detail and flat colour fields. Its weakness is elasticity: cotton slackens more with changes in humidity and loses tension over time.

Linen is more expensive and more durable. Its long, strong fibres hold their dimensions better through humidity changes. The weave is pronounced, leaving a slight rhythm on the surface, which some work wants. In the classical oil tradition linen is standard, and most older works in museum collections are on linen.

In short: over the short and medium term the difference is small; over the long term linen leads. But a well-stretched, well-primed cotton canvas always beats a badly prepared linen.

Weight and weave#

Two technical properties decide the choice.

Weight is the grams per square metre of the fabric. Higher weight means a thicker, more durable surface. Thin canvases sag in the middle at large sizes.

Weave is the density of the threads. A tight weave gives a smooth surface that carries fine detail; an open weave leaves a visible texture and gives brushwork character.

For large-scale work, high weight and tight weave should go together.

Priming: the step never skipped#

Raw canvas absorbs paint directly. Working on an unprimed surface lets paint sink into the fibre, dulls the colour, and over time allows the fibre to interact chemically with the paint.

Priming breaks that contact. The most common primer is gesso: it seals the surface, keeps the paint on top and lets colour read saturated.

How many coats depends on the surface, but one is almost never enough. Two or three thin coats with a light sanding between them work far better than a single thick one.

Most ready-made canvases come primed, but the quality varies. On cheap canvases the priming is thin; adding another coat noticeably extends a work's life.

I explained why surface preparation is never skipped in oil painting separately; in acrylic gesso does the same job.

Stretching: how to spot a good canvas#

This is the part most useful to a buyer.

What to look for:

• Tension. Press gently in the centre; it should give slightly and spring straight back. Neither drum-tight nor slack
• Corners. The fabric should be neatly folded and stapled at the corners. Bunched, creased corners signal poor workmanship
• Key slots. A good stretcher has slots at the corners for small wooden keys, used to re-tension the canvas if it slackens later
• Stretcher depth. At large sizes a thin stretcher bows in the middle; work over 100 cm should have a cross brace
• The back. If the fabric wraps around and is stapled at the back, no staples show from the side, which is a cleaner finish

Looking at the back when buying a piece is not odd; it is the right thing to do. On a painting to be shown without a frame it matters even more, since the sides will be visible.

Stretchers and timber#

The frame the canvas is stretched over is the stretcher, and its quality directly determines how flat the work stays.

Unseasoned timber warps over time and warps the canvas with it. A good stretcher is made from seasoned, knot-free wood.

The profile matters too: good stretchers have a slightly raised front edge so the canvas does not touch the back bar. Where it does, a visible line appears over time.

Alternative surfaces#

Canvas is not the only option.

Wood panel, MDF and hardboard give a more rigid surface. They are preferred for small-scale, finely detailed work; since they do not flex, the risk of cracking is lower. Their weight is a disadvantage at scale.

Paper and card suit sketches and studies. For permanent work they need to be heavy and acid-free.

At Peck Art Studio the acrylic paintings offered through custom orders are made on canvas.

Size and price#

Canvas cost rises linearly with area, but it is a small item in the price of a work. What really sets the price is labour.

A custom canvas painting starts at 7,000 TL per square metre and rises with detail density. I set out the full pricing separately.

Care and storage#

Canvas is a surface sensitive to humidity and temperature.

• Do not hang it on a damp wall; air should circulate behind it
• Keep it out of direct sun
• Do not touch the surface with your fingers; skin oils leave marks over time
• Do not press anything against the back; the canvas deforms permanently
• Carry it upright, never stacked flat

I gathered oil painting care and transport and packing in separate articles.

What to check, in short#

If you are buying canvas: choose high weight, a weave suited to your work, good priming and a stretcher with key slots.

If you are buying a painting: look at the back. Is it taut, are the corners neat, is the stretcher sound. Those three tell you most of what you need to know about how it will look in ten years.

You can see finished work in the gallery, with the technique and dimensions listed on each page.