Oil Pastel and Oil Stick on Paper: What the Medium Actually Is

There's a lot of confusion about oil pastel and oil stick — what they are, how they differ from each other, how they differ from soft pastel or oil paint. This is an attempt to clear that up, written from the perspective of someone who works with both daily.

Oil pastel

Oil pastel is pigment bound with oil and wax. The result is a stick that behaves somewhere between a crayon and oil paint — it can be dragged across paper to deposit dense colour, built up in layers, blended with a finger or a solvent, or left as direct, unworked mark.

The key characteristic of oil pastel is that it never fully dries. The oil and wax remain slightly workable indefinitely. This means the surface of an oil pastel work is alive in a way that acrylic or watercolour isn't — it can be reworked, scratched into, pressed into with another colour on top.

On paper, oil pastel responds directly to the tooth of the surface. A rough, cold-pressed paper grabs the pigment and holds it differently than a smooth hot-pressed sheet. The texture of the paper becomes part of the image — you can see it in the way colour breaks across the grain, in the gaps where pigment didn't reach.

This is one of the reasons oil pastel on paper is irreproducible. A scan or print captures the colour and approximate tone, but flattens the surface. The paper tooth, the variation in pigment density, the slight sheen of the wax — these disappear. What you see in a photograph of an oil pastel work is a translation, not the work itself.

Oil stick

Oil stick is oil paint in stick form — pigment ground in linseed or safflower oil, with enough wax added to give it a solid form. Unlike oil pastel, oil stick does dry. It behaves like oil paint: it can be blended while wet, it builds up impasto, it oxidises and hardens over days or weeks.

The gesture of oil stick is different from oil pastel. Because it's harder and drier at the point of contact, it deposits marks with more resistance. You feel the paper pushing back. A single stroke can carry a lot of pigment or almost none depending on pressure and the surface's saturation point.

Oil stick on paper produces marks that look structural — they have weight. A line made with oil stick reads differently than one made with oil pastel. The oil pastel line is softer, more dissolved at the edges. The oil stick line holds its form, reads as deliberate, sometimes aggressive.

Working with both in the same piece — oil pastel for the body of colour, oil stick for marks over the top, or vice versa — creates a surface with multiple registers of touch. The viewer's eye moves between areas of different density, different dryness, different presence.

Paper

The choice of paper is not incidental. Paper for oil pastel and oil stick needs enough weight to handle the oil content without buckling or degrading, and enough texture to grip pigment across multiple layers.

Heavy cotton rag papers — 300gsm and above — absorb oil without warping and maintain their structure as layers build up. The archival question matters for original works. A work on acid-free cotton rag paper, stored correctly, will remain stable for decades.

What the scan is

When I produce texture packs from my work, I scan the paper at 600 dpi. What the scan captures is a very accurate record of colour and value. What it doesn't capture is the surface itself — the slight raise of pigment, the variation in sheen between waxier and drier areas, the way the paper edge feels.

The scan is a document. A useful one, and the basis of the texture packs available here. But it's not the work. The work is the paper.

Why small format

The small-format constraint — A5, 20×20, 30×30 — isn't a limitation. It's a decision. At small scale, every mark is in play. There's no background to fill, no area that can stay unresolved. The image has to work at every point of the surface simultaneously.

Small works on paper also have a physical presence that's easy to underestimate from photographs. An A5 sheet is a very specific object. It has a weight, a softness, a faint smell of oil. These things are part of what you own when you own an original.