Acrylic colour

The governing concept is a tint scale, in which one hue is made progressively lighter by adding increasing amounts of white. Using the same base colour makes the comparison meaningful, while controlled additions of white show a clear change in value. Choosing different base colours does not form a scale of one hue. Extra water mainly changes fluidity and coverage, and increasing black produces darker shades rather than lighter tints. Thus, option A is correct.

The governing concept is modelling form with a gradual value structure. A round object appears three-dimensional when a highlight, midtone, and shadow are arranged consistently with the chosen light source. The highlight indicates the strongest light, the midtone describes the turning surface, and the shadow establishes the side away from light. An outline or flat colour shows shape but not volume, and white alone cannot model every plane. Option A is correct.

The governing concept is pictorial depth through relative detail and contrast. Nearby objects usually appear sharper and more prominent when they contain more visible detail and stronger contrast, while distant objects can be softened, simplified, or made less contrasting. Giving every object the same colour removes useful separation; making distant objects darkest can reverse the expected spatial effect; and removing every edge destroys structure. Therefore, option B is correct.

The governing painting-technique concept is impasto, in which paint is applied in a thick, raised layer so that brush or knife marks and surface texture remain visible. Thus option A is correct. A wash uses diluted paint in a thin, usually transparent layer; glazing also refers to a thin transparent layer placed over a dry layer. Dry-brush application uses relatively little paint to create broken texture, not a deliberately thick raised coating. The defining clue is thickness and relief.

The governing painting concept is glazing. Glazing means applying a thin, transparent or translucent layer of colour over a prepared, usually dry layer, allowing the underlying colour or drawing to influence the final appearance; therefore option B is correct. Moulding concerns shaping material, while cutting and stencil cutting are construction or design processes rather than transparent paint application. Acrylic glazing medium may be used to improve flow and working transparency.

The governing concept is the role of a binder in paint. A binder holds pigment particles together and helps them adhere to the painting surface. In acrylic colour, this function is generally provided by an acrylic polymer emulsion, so option A is correct. Linseed oil is associated with oil colour, gum arabic with traditional watercolour, and wax with wax-based media, making those alternatives less suitable here.

The governing concept is adjusting paint consistency. While acrylic colour is still wet, a small amount of clean water is generally used to make it thinner and easier to spread, so option B is correct. Kerosene and wax are not suitable thinners for ordinary acrylic paint, and varnish is a finishing protective layer rather than a thinning agent. Excessive water should be avoided because it can weaken the paint film.

Acrylic colour is a water-based medium that generally dries relatively quickly as water evaporates from the paint film. This fast drying allows an artist to build layers sooner, but it also means that blending must often be planned and completed promptly. Option C is correct because quick drying is a recognized practical characteristic. The other choices are incorrect: acrylic does dry, can be used on several prepared surfaces, and may be opaque or transparent depending on pigment, dilution, and medium.

Acrylic paint dries into a firm, water-resistant film as its water content evaporates. If paint is left in a brush, it can harden between the bristles, make them stick together, and permanently reduce the brush’s flexibility and usefulness. Therefore, option A is correct: immediate washing removes the paint before it sets. The other options do not describe the real reason; brush colour, weight, and watercolour drying are unrelated to acrylic brush care.

A retarder medium is formulated to slow the evaporation and drying process of acrylic paint. When used in a suitable, limited amount, it keeps the paint workable for a longer period, giving the artist more time for blending and controlled transitions. Option C is therefore correct. Sand and chalk powder are solid additives rather than drying-control media, while mustard oil is not the appropriate medium for acrylic paint and can interfere with adhesion and film formation.

Impasto is a painting technique in which pigment is applied in thick, visible layers so that the surface develops raised texture and expressive marks. Option D is correct because the defining feature is the physical thickness of the paint, not merely a change in colour. A wash uses diluted, thin paint; stippling builds texture with dots; and blending softens transitions between colours. Those techniques may appear in the same artwork but do not specifically mean thick raised application.

A glazing medium is designed to increase the transparency and flow of acrylic colour while helping the layer remain even and stable. It allows a thin transparent film to be placed over a dry layer, so the underlying colour continues to show through. Therefore, option B is correct. Clay, charcoal powder, and wax are not suitable acrylic glazing media; they can alter texture, adhesion, or surface stability rather than produce a controlled transparent layer.

Applying a thin transparent layer over a dry layer is a glazing process. Light passes through the upper colour, interacts visually with the lower colour, and returns to the viewer, producing greater richness, depth, and colour unity. Option C is correct. The lower colour is not erased; the canvas itself does not become transparent, and a properly applied glaze should not normally break the surface. Allowing the first layer to dry prevents unwanted mixing and keeps the effect controlled.

Gesso is a preparatory ground commonly applied to canvas before painting. It helps provide a more uniform, slightly absorbent surface, improves the paint’s adhesion, and reduces the need for acrylic colour to sink unevenly into the fabric. Therefore, option A is correct. Machine oil and wax are unsuitable oily or slippery materials, while varnish is generally used as a finishing protective coating after the painting has dried, not as the normal base layer before acrylic work.

Gesso is a preparatory ground applied before painting. It seals or controls the absorbency of a surface and provides a slightly toothy layer so paint can grip evenly. Therefore, option B is correct: it makes the surface suitable for receiving paint. It does not instantly dry paint, create gloss as its main purpose, or erase colour; those descriptions are unrelated to surface preparation.

Wood may contain dust, rough fibres and uneven absorbency, so surface preparation is important before painting. Cleaning removes dirt, smoothing reduces unwanted texture, and priming improves adhesion and creates a more even ground. Thus option D is correct. Soaking in oil, burning the wood or applying wax can interfere with adhesion and does not provide the normal preparation needed for durable acrylic painting.

Scumbling applies a thin, broken or semi-opaque layer over an existing colour, commonly using a dry or lightly loaded brush. Gaps between the strokes allow some of the lower layer to remain visible, producing a varied texture and light effect. Option A is correct. A watery application suggests a wash, a single thick layer suggests impasto, and dots alone describe stippling rather than scumbling.

The governing concept is opacity, meaning how completely a paint layer hides the surface below it. Applying acrylic in a thicker layer increases coverage, while choosing an opaque pigment also blocks more of the underlying surface. Adding much water usually makes the paint more transparent, and wiping removes coverage. Varnish can alter finish but does not by itself provide paint opacity. Therefore option B is correct.

The governing concept is transparency through a thin wash. Acrylic can imitate a watercolour-like appearance when it is applied in a thin, diluted layer or mixed with a suitable acrylic glazing medium. A medium is often preferable when excessive water could weaken the binder. A thick layer increases opacity, while clay or oil is unrelated to this effect. Hence option C is the correct practical method.

The governing concept is an impasto-like surface effect, in which paint is built up to create visible thickness and relief. Using acrylic with a heavy body, or mixing it with modelling paste, allows the artist to place raised strokes that resemble the texture of thick oil paint. Heavy dilution makes a thin wash, while wetting paper or wiping paint removes or reduces the layer. Therefore option D is correct.

The governing concept is building surface texture in acrylic painting. Modelling paste is a thick acrylic-compatible material that can be applied beneath or mixed with paint to create raised marks, relief, and three-dimensional texture. It is not a remover, brush-cleaning liquid, or a material for folding the finished artwork. After drying, the textured area can usually be painted or coloured. Thus option A correctly identifies its main use.

The governing concept is controlled layering. Acrylic forms a separate film as it dries, so allowing the lower layer to become sufficiently dry helps the next layer remain clean, sharp, and visually distinct. Applying a new wet layer too soon can disturb, lift, or unintentionally mix with the layer beneath. Drying does not turn acrylic into oil, change the canvas colour by itself, or harden the brush. Therefore option B is correct.

The governing concept is acrylic paint’s relatively opaque, quick-drying layer. For a small mistake, allow the incorrect area to dry, then apply the correct colour over it with a suitable brush. This covers the unwanted mark without damaging the whole painting. Washing the entire work, tearing the canvas, or adding only water does not provide a controlled correction.

The governing concept is moisture retention during acrylic painting. A stay-wet palette uses a moist layer and a suitable surface to slow evaporation, so usable acrylic colour remains workable for longer. A hot metal plate would speed drying, while dry sand and dry wood do not supply controlled moisture. Therefore, the stay-wet palette is the practical choice.

The governing concept is efficient handling of fast-drying acrylic paint. Because acrylic colour can dry on an exposed palette, putting out only the amount needed reduces the quantity that becomes hard and unusable. This saves material and keeps the palette manageable. The amount of paint cannot make the canvas smaller, change brush size, or become heavier in the stated way.