# Sculpture: Taking Away and Building Up

Art History I · Artistic Languages · https://tryals.app/learn/art-history-i/sculpture-taking-away-and-building-up

## Subtractive and Additive

Sculpture relies on two fundamental processes:

* **Subtractive: carving.** Stone or wood is removed. Every cut is irreversible. The form must fit within the initial block.
* **Additive: modelling.** Clay or wax is built up. The process is fully reversible and permits rapid revision. Clay is fragile, so models are usually cast in bronze.

The · Stone holds its compact mass, keeping limbs close. Tensile bronze can extend thin limbs freely into space.

### Lost-wax casting

The **cire perdue** (lost-wax) method creates hollow bronze sculpture:

* In the **direct** method, the original wax model is destroyed. The cast is unique.
* In the **indirect** method, a master mould survives. This allows the artist to produce multiple editions.

### Relief

Relief sculpture remains attached to a background plane.

| Type | Projection | Effect |
|---|---|---|
| **Bas-relief** | Shallow | Reads like a drawing in depth |
| **High relief** | Over half the depth | Figures appear almost freestanding |
| **Sunken relief** | Cut below surface | Sharp shadows in raking light |
| **Rilievo schiacciato** | Extremely flat | Creates perspective in millimetres |

### Material Demands

Stone resists, wood follows grain, and bronze holds tension.

> **Common pitfall:** treating bronze and marble versions of a figure as identical designs. Material dictates structure; a marble arm requires a supporting strut, whereas bronze extends unsupported.

## Practice questions

9 of this lesson's 13 practice questions, with answers. The full set is in the app.

### 1. A marble figure holds an arm out into empty space. Why does the sculptor usually leave a strut of stone somewhere?

A. Marble is weak in compression, so additional vertical props stop the lower torso collapsing
B. The strut serves as a temporary transport bridge that is chiselled away prior to final display
C. It preserves the measured reference points used to scale up the original clay or wax maquette
D. Marble is weak in tension, so an unsupported projecting limb would break under its own weight

**Answer:** D. Marble is weak in tension, so an unsupported projecting limb would break under its own weight

**Why:** Because marble is **weak in tension**. A projecting limb is loaded in bending at its root, and stone fails there; the strut carries that load. Bronze needs no such thing, which is why an outstretched arm with nothing beneath it is usually a reliable sign that you are looking at a cast rather than a carving.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/a-marble-figure-holds-an-arm-out-into-empty-space-why-does-the

### 2. Which are true of the indirect lost-wax method?

A. The original model is destroyed in the process
B. A durable mould is taken before the wax is made
C. It is why bronzes exist in editions
D. Multiple casts can be produced from one model

**Answer:** B. A durable mould is taken before the wax is made; C. It is why bronzes exist in editions; D. Multiple casts can be produced from one model

**Why:** The fourth belongs to the **direct** method, where the original wax is lost and the cast is unique. The indirect method is why "the original" is a harder question for a bronze than for a marble: several casts can be entirely authentic, and later casts from the same mould raise questions a carving never poses.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/which-are-true-of-the-indirect-lost-wax-method

### 3. Complete the account of sculptural process.

**Answer:** Carving is a **subtractive** process in which nothing can be put back, while modelling is **additive** and reversible. Bronze is made by the **lost**-wax process, in which the wax is melted out to leave a cavity. Relief in which figures project more than half their depth is **high** relief.

**Why:** The four terms cover process and result. Note that the first two are not merely techniques: they impose different working methods, different tolerances for error, and different possible poses, which is why the division is the first thing to establish about any sculpture.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/complete-the-account-of-sculptural-process

### 4. A clay model is usually the final object in modelled sculpture.

**Answer:** False

**Why:** **False.** Clay is fragile and the model is normally an intermediate stage, cast into bronze through the lost-wax process. That is why the sculptor's hand is visible in a bronze surface, what you are seeing is a metal record of a modelled clay original.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/a-clay-model-is-usually-the-final-object-in-modelled-sculpture

### 5. How many main steps does the lost-wax process take, as set out in this lesson?

**Answer:** 7 (within ±1)

**Why:** **Seven**, from modelling the figure through to chasing and patinating the finished cast. The number matters less than the order: the wax must be exactly as thick as the metal will be, because that layer is what the bronze replaces.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/how-many-main-steps-does-the-lost-wax-process-take-as-set-out-in

### 6. Sort each work characteristic by the material it points to.

**Answer:**

- Points to carved stone: Limbs held close to the body, A strut of material left in place, Compactness inherited from the block
- Points to cast bronze: An arm extended into empty space, Thin projecting elements that hold, The same figure existing in several authentic versions

**Why:** The list amounts to a practical identification method. You can usually tell carved from cast across a gallery, before reading any label, because the pose records the material's tensile strength.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/sort-each-work-characteristic-by-the-material-it-points-to

### 7. Arrange the stages of the lost-wax process in order.

**Answer:**

1. Model the figure over an armature
2. Take a mould from the model
3. Form a wax layer over a heat-resistant core
4. Invest the wax and melt it out
5. Pour molten bronze into the cavity

**Why:** The third and fourth steps are where the process gets its name and its logic: the wax occupies exactly the space the metal will occupy, so the thickness of that layer is the thickness of the finished bronze.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/arrange-the-stages-of-the-lost-wax-process-in-order

### 8. Subtractive carving is described as irreversible, whereas additive modelling is fully reversible. What does this distinction fundamentally impose on the sculptor's practical workflow?

A. Modelling lets the sculptor disregard structural weight during design
B. Carving demands that the final envelope remains fixed from the start
C. Modelling requires casting in bronze before making further alterations
D. Carving prevents the artist from planning compositions beforehand

**Answer:** B. Carving demands that the final envelope remains fixed from the start

**Why:** Treating modelling as weightless confuses malleability with structural physics. Carving requires strict advance planning precisely because every removal is final and bound to the initial block, whereas casting is a preservation measure rather than an operational constraint on making changes.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/subtractive-carving-is-described-as-irreversible-whereas-additive

### 9. Arrange these decisions in the order a sculptor faces them.

**Answer:**

1. Choose subtractive or additive process
2. Choose the material within that process
3. Decide what the pose can be, given what the material permits
4. Work the form
5. Finish the surface: chasing, polishing or patination

**Why:** The third step is the argument of the lesson. The material decides what pose is possible before any work begins, which is why the same figure in bronze and in marble is two different solutions rather than one design executed twice.

Page: https://tryals.app/practice/art-history-i/sculpture-taking-away-and-building-up/arrange-these-decisions-in-the-order-a-sculptor-faces-them