What are art materials, media and techniques?
A material is the stuff you use (paint, clay, paper). A medium (plural media) is the type of material an artwork is made in, such as 'watercolour on paper'. A technique is the way you use it (washes, hatching, carving). A process is a series of steps, such as printmaking or casting.
Tools (brushes, knives, rollers) and gesture (how fast or hard you move your hand) change the marks a material can make. A big, fast brush gives energy; a fine, slow pen gives detail.
Pigments and binders: what paint is made of
A pigment is a fine coloured powder. Pigments come from earth (ochres), minerals, plants, insects or are made in factories. A binder is a liquid that dries and glues the pigment down.
| Paint | Binder | Thinned with |
|---|---|---|
| Watercolour, gouache | Gum arabic | Water |
| Acrylic | Acrylic polymer | Water (dries waterproof) |
| Oil paint | Linseed oil | Solvent or oil |
| Egg tempera | Egg yolk | Water |
| Fresco | Wet lime plaster | Water |
Materiality means how the physical material itself affects the meaning: thick, rough oil paint feels different from a thin, smooth wash.
Dry media: drawing materials
- Graphite pencils: graded from 9H (hardest, lightest) through HB and F (middle) to 9B (softest, darkest). Use H for light guide lines, B for shading.
- Charcoal: very dark, smudges easily, good for bold tone. Fix with spray fixative.
- Pastels: soft (chalk) or oil pastels; strong colour, blend with fingers or paper stumps.
- Coloured pencils and pens: good for detail and line.
Drawing terms: hatching (parallel lines), cross-hatching (crossed lines), stippling (dots), blending (smooth tone).
Wet media: painting techniques
- Watercolour: transparent. Work light to dark. Techniques: flat wash, graded wash, wet-on-wet, dry brush, lifting out.
- Gouache and poster paint: opaque watercolour, matt and flat.
- Acrylic: dries fast, can be thin like watercolour or thick (impasto). Waterproof when dry.
- Oil: dries slowly so colours can be blended for days; glazing (thin transparent layers) and impasto.
- Ink: pen lines or brush washes.
A tint is a colour plus white; a shade is a colour plus black. Try the sliders in the last 3D step.
Supports and grounds
The support is what you work on. Paper is measured by weight in grams per square metre (g/m²): 80 g/m² printer paper buckles when wet; watercolour paper is often 300 g/m². Paper can be smooth (hot-pressed) or textured (cold-pressed). Canvas (cotton or linen) is stretched on a frame. Wood panels, card and walls are also used.
A ground such as gesso is a primer layer that seals the support so paint does not soak in too much.
3D, print, decorative and digital processes
3D
Modelling adds material (clay, wax); carving takes it away (wood, stone); construction joins parts (card, wire, found objects); casting pours liquid into a mould (plaster, bronze). Clay is dried and then fired in a kiln at about 1000 °C to become ceramic.
Printmaking
One matrix (block, plate or screen) makes many copies. Relief prints (lino, woodcut) ink the raised parts; intaglio (etching) inks the grooves; screen printing pushes ink through a stencil. Indian block printing (for example in Rajasthan) is a relief print on cloth.
Decorative and applied art
Textiles, ceramics, mosaic, jewellery and murals are art that is also useful or decorates a space.
Digital media
Drawing tablets, photo editing, 3D modelling and video are newer media. They allow layers and 'undo', and work is easy to copy and share.
Experimenting and refining your work
Artists test before they commit. Make small test strips: the same colour on three papers, or the same subject in pencil, ink and paint. Note what works in a sketchbook. Choose the medium that best shows your idea, then refine: adjust tone, edges and detail.
When presenting, mount flat work on card, label it with title, medium, size and date, and light it evenly.
Using materials safely and sustainably
- Work in fresh air with sprays, solvents and fixatives; never eat while painting.
- Some old pigments (lead white, cadmium) are toxic: read labels and wash hands.
- Wear a mask with clay dust and pastel dust; cut away from your body with craft knives.
- Do not pour solvents or acrylic water down the sink; let solids settle and dispose properly.
- Reuse scrap paper, choose water-based paints, and look after brushes so they last.
Key formulas and definitions
- Paint = pigment + binder
- H pencil = hard, light line; B pencil = soft, dark line; HB = middle
- Tint = colour + white; shade = colour + black; tone = colour + grey
- Transparent medium: lower layers show through (watercolour, glaze)
- Opaque medium: covers lower layers (gouache, acrylic, oil)
- Support = surface (paper, canvas, wood); ground = primer layer (gesso)
- Relief print: ink on raised parts; intaglio: ink in grooves
Worked examples
1. You want a soft, misty sky that lets the paper glow through. Which medium and technique?
Step 1: Glow through = transparent. Step 2: Watercolour is transparent. Step 3: Use a wet-on-wet wash on heavy (about 300 g/m²) watercolour paper so it does not buckle.
2. Which pencil for a light guideline, and which for the darkest shadow: 2H, HB or 6B?
2H is hard and light, so use it for guidelines that you can erase. 6B is the softest and darkest, so use it for deep shadow. HB is in between.
3. A student paints with acrylic on thin printer paper and it wrinkles. What should they change?
The support is too thin (about 80 g/m²) and soaks up water. Use heavier paper or card, or prime the surface with gesso first.
Common mistakes
- Thinking 'medium' means 'medium size'. In art, a medium is the material an artwork is made with.
- Believing a higher B number means a harder pencil. It is the opposite: more B = softer and darker.
- Putting light watercolour on top of dark watercolour and expecting it to cover. Watercolour is transparent, so work light to dark.
- Washing solvents or paint sludge down the sink. It harms water and drains; let it settle and dispose properly.