# Brushes, Tools and the Mark

Painting I · Colour, Perception and Materials · https://tryals.app/learn/painting-i/brushes-tools-and-the-mark

## The Tool Is Half the Mark

Every mark records both an artist's decision and the instrument used.

### Anatomy and Shapes

A brush consists of hair, a **ferrule**, and a handle. The **heel** is where hair enters the ferrule. Dried paint here splays the bristles permanently.

- **round**: produces lines varied by pressure.
- **bright**: short flat bristle for controllable strokes.
- **long flat**: carries more paint for broad bands.
- **filbert**: flat with rounded edges that blends smoothly.
- **rigger**: creates exceptionally long, fine lines.

**Brush numbering is not standardised.** Sizes vary by maker. Compare sizes by measuring the ferrule width directly.

### Other Tools

- **Painting knife**: creates flat facets with sharp edges.
- **Palette knife**: straight blade for mixing paint, not application.
- **Roller and squeegee**: applies even films without directional brushstrokes.
- **Rag**: lifts paint to expose the ground beneath.
- **Airbrush**: sprays smooth gradients without hard edges.

### Named Marks

| Mark | What it is | Requirements |
|---|---|---|
| **Impasto** | Thick paint raised from the surface | Stiff paint and bristle brush or knife |
| **Glaze** | Transparent dark layer over a light base | Dry underlayer and fat medium |
| **Scumble** | Opaque light layer dragged over dark | Stiff paint and dry brush |
| **Dry brush** | Broken texture dragged across the weave | Stiff brush and textured ground |
| **Sgraffito** | Wet surface scratched to reveal lower layers | Wet layer and hard point |

> **Common pitfall:** leaving brushes resting on their tips in solvent. This bends the hair permanently and dissolves heel adhesive. Wash thoroughly to the heel, reshape the head, and dry upright on the handle.

## Practice questions

6 of this lesson's 12 practice questions, with answers. The full set is in the app.

### 1. Why does a brush die at the heel rather than at the tip? Select every statement that is true of the heel.

A. It is the part of the brush that touches the canvas most often
B. It is where the hair enters the ferrule and cannot be reached by cleaning the tip
C. Paint dried in it splays the hair permanently outwards
D. Solvent standing in a jar creeps up into it and attacks the adhesive

**Answer:** B. It is where the hair enters the ferrule and cannot be reached by cleaning the tip; C. Paint dried in it splays the hair permanently outwards; D. Solvent standing in a jar creeps up into it and attacks the adhesive

**Why:** The heel never touches the canvas, which is exactly why it is neglected and why it kills brushes. Once dried paint has wedged the hair apart at the ferrule the shape is gone for good, and a brush that cannot come to a point or a clean edge cannot be repaired by any amount of care at the other end.

Page: https://tryals.app/practice/painting-i/brushes-tools-and-the-mark/why-does-a-brush-die-at-the-heel-rather-than-at-the-tip-select-every

### 2. Sort each described passage by the mark it is.

**Answer:**

- Glaze: A transparent dark laid over a lighter dry layer
- Scumble: An opaque light dragged broken over a darker layer
- Impasto: Paint standing proud enough to cast its own shadow, A ridge of white loaded on with a knife and left with its edge intact

**Why:** Glaze and scumble are opposites in both directions at once, transparent dark over light against opaque light over dark, and confusing them produces the commonest fault in the studio, an opaque colour used as a glaze, which goes dead instead of glowing because no light gets back out.

Page: https://tryals.app/practice/painting-i/brushes-tools-and-the-mark/sort-each-described-passage-by-the-mark-it-is

### 3. Arrange these developments in the painter's toolkit in the order they happened.

**Answer:**

1. Ground paint is stored in tied pig's bladders, pierced with a tack to release it
2. Metal ferrules make the flat brush possible in the early nineteenth century
3. Colourmen begin selling paint in glass syringes in the 1820s
4. John Goffe Rand patents the collapsible metal tube in 1841
5. Screw-capped tubes and the portable box easel take painters outdoors

**Why:** Renoir said that without paint in tubes there would have been no Impressionism, and the sequence shows why that is not an exaggeration. A bladder cannot be resealed and a syringe barely can; the tube is the first container that lets a painter carry twenty colours into a field and bring nineteen of them home.

Page: https://tryals.app/practice/painting-i/brushes-tools-and-the-mark/arrange-these-developments-in-the-painters-toolkit-in-the-order-they

### 4. A scumble requires an opaque light film dragged across a dark ground, whereas a glaze demands transparent dark paint over a light ground. What practical consequence follows when creating optical depth with these layered marks?

A. A scumble must be diluted with excess vehicle to remain semi-transparent
B. A scumble relies on physical bristle drag rather than liquid vehicle flow
C. A scumble can only be laid using soft sable hairs rather than stiff bristles
D. A scumble requires a completely wet ground to blend the underlying values

**Answer:** B. A scumble relies on physical bristle drag rather than liquid vehicle flow

**Why:** Diluting paint with excess medium converts a scumble into a glaze-like wash, whereas scumbling depends mechanically on stiff paint catching on textured underlayers. Blending into wet paint destroys the optical interplay between layers, which requires distinct dry boundaries.

Page: https://tryals.app/practice/painting-i/brushes-tools-and-the-mark/a-scumble-requires-an-opaque-light-film-dragged-across-a-dark-ground

### 5. Arrange the steps of cleaning and storing a brush in the correct order.

**Answer:**

1. Wipe the loaded brush out on a rag before any solvent touches it
2. Rinse in solvent, working the hair against the side of the container rather than the bottom
3. Wash with soap and lukewarm water right down to the heel
4. Reshape the hair to its point or edge while it is still wet
5. Stand the brush upright on its handle end, or lay it flat, to dry

**Why:** The third step is the one people skip and the one that decides the brush's life. Solvent removes the paint you can see; only washing to the heel removes what is wedged where the hair enters the ferrule, and that is the deposit that splays a brush permanently.

Page: https://tryals.app/practice/painting-i/brushes-tools-and-the-mark/arrange-the-steps-of-cleaning-and-storing-a-brush-in-the-correct

### 6. A brush is best cleaned by standing it tip-down in a jar of solvent overnight.

**Answer:** False

**Why:** **False**, and it destroys brushes twice over. The weight of the brush bends the hair permanently against the bottom of the jar, and the solvent creeps into the heel and attacks the adhesive holding the hair in the ferrule. Wash out to the heel, reshape wet, and store handle-down.

Page: https://tryals.app/practice/painting-i/brushes-tools-and-the-mark/a-brush-is-best-cleaned-by-standing-it-tip-down-in-a-jar-of-solvent