Acrylic colour

Correct answer: B. Adjust optical spacing according to letter shapes

Explanation: The governing design concept is optical spacing, also called visual or perceived spacing. Letters have different shapes and amounts of internal white space, so equal measured gaps do not necessarily appear equal to the eye. The artist should slightly adjust individual gaps according to neighbouring forms until the word looks balanced. Option B is correct; equal widths, a wet background or changing colours does not solve the spacing problem.

Correct answer: D. The paint was too thin or the brush was overloaded

Explanation: The governing concept is edge control, which depends on suitable paint consistency and a properly loaded brush. Very thin paint flows easily beyond the intended boundary, while an overloaded brush releases more paint than the hand can control. Option D is therefore the most complete answer because it includes both common causes. Option A and B mention only one factor, while a light outline alone does not make paint spread.

Correct answer: B. Layer thickness, surface texture or surrounding colours differed

Explanation: The governing concept is colour perception in context. Although the wet mixture may be identical, a thicker or thinner layer can change its apparent value and opacity; surface texture changes reflected light; and neighbouring colours can create contrast effects. Thus option B is correct. A brush name or colour name does not alter the dried paint by itself, and coloured water is not the general explanation.

Correct answer: A. By adding a small amount of its complement or a related darker colour to the local colour

Explanation: The governing concept is colour-based modelling: a shadow should be darker while remaining related to the object’s local hue. A small amount of a suitable complementary or neighbouring dark colour can lower value and adjust temperature without erasing that identity, so option A is correct. Pure black may flatten or dirty the hue, white lightens it, and excessive water changes opacity rather than reliably deepening the shadow.

Correct answer: B. Add related hues and subtle temperature shifts within the shadow

Explanation: The governing concept is colour variation within a shadow. Realistic form is strengthened when a shadow contains related hues and small warm–cool shifts rather than one flat dark patch. Option B is therefore the best correction because it adds visual life while maintaining volume. More black can produce a dull, featureless area; white removes depth, and a dark outline describes an edge rather than modelling the surface.

Correct answer: B. The surface had grease or a water-repellent substance

Explanation: The governing surface-preparation concept is adhesion and wetting. Acrylic paint must spread and bond to a clean, suitably receptive surface. Grease, wax or another water-repellent contaminant makes the surface resist the water-based coating, causing it to contract into small beads; therefore option B is correct. Paint darkness, brush cleanliness and background lightness do not normally produce this beading defect.

Correct answer: B. Mix a suitable glazing medium into the colour

Explanation: The governing concept is glazing: a transparent or translucent acrylic film is built by reducing opacity while retaining an even, workable binder. A suitable glazing medium is designed for this purpose, so option B is correct. Excessive white makes the mixture lighter but opaque, while oil or chalk changes compatibility and surface behaviour rather than producing a proper acrylic glaze.

Correct answer: C. Polymer particles join to form a durable film

Explanation: The governing material concept is polymer-film formation. Wet acrylic contains water and dispersed acrylic polymer particles; as the water evaporates, the particles come together and form a continuous, durable film. Therefore, option C is correct and explains the paint’s water-resistant behaviour after drying. Salt, freezing water, and dissolved paper fibres are not the mechanism responsible for acrylic’s dried surface.

Correct answer: D. The layer may lift and form patches on the surface

Explanation: The governing concept is controlled layering: acrylic should be allowed to settle and dry before it is repeatedly disturbed. Brushing a wet or partly dry layer can re-wet and lift the film, producing streaks, bald patches, or muddy marks. Therefore option D is correct. Options A, B, and C do not describe the normal result of excessive brushing; gloss, canvas hardness, and immediate waterproofing are not reliable consequences.

Correct answer: A. The value may shift slightly between wet and dry states

Explanation: The governing concept is the wet-to-dry shift in acrylic appearance. While wet, the paint film can look darker, glossier, or more saturated because of surface moisture; after water evaporates and the binder settles, its value and intensity may change slightly. Thus option A is correct. The colour does not normally become completely white, and neither the canvas nor brush hairs reverses or turns it blue.

Correct answer: B. Impasto medium

Explanation: The governing concept is maintaining paint body while building relief. An impasto medium is designed to thicken acrylic and help it hold raised marks, peaks, and textured strokes without excessively weakening the binder. Therefore option B is correct. Adding a large amount of water makes the paint runnier and can reduce film strength; ink, glue water, and kerosene are not appropriate standard materials for constructing stable acrylic texture.

Correct answer: C. The binder may weaken and the paint film may become powdery or unstable

Explanation: The governing concept is the balance between water and acrylic polymer binder. A small, controlled amount of water can adjust flow, but excessive water dilutes the binder so much that the dried film may lose cohesion, become powdery, or adhere poorly. Option C is therefore correct. Water cannot turn paint into metal, lengthen a brush, or create an automatic varnish layer; those choices are unrelated to acrylic chemistry.

Correct answer: D. Blending wet colours with a retarder or slow-drying medium

Explanation: The governing concept is extending the open working time of acrylic paint. A retarder or slow-drying medium keeps the colours workable for longer, allowing their edges to be blended before they set and producing a smoother gradation. Option D is correct. Pencil rubbing and scraping do not create a continuous paint transition, while applying colours on separate days removes the wet blending opportunity rather than improving it.

Correct answer: A. The first layer is touch-dry and stable

Explanation: The governing concept is sequential layering. Before applying a second acrylic layer, the first should be sufficiently touch-dry and stable; otherwise the brush can disturb, mix, or lift the underlayer and spoil the intended shapes. Therefore option A is correct. A completely wet canvas prevents controlled layering, oil on the brush can interfere with acrylic adhesion, and room lighting has no necessary role in deciding whether the layer is ready.

Correct answer: B. Applying thin transparent colour layers first

Explanation: The governing concept is transparent underpainting and gradual colour buildup. Thin, transparent acrylic layers allow the preliminary drawing to remain visible while the artist establishes colour and value step by step. Thus option B is correct. A thick black coat would hide the drawing, water will not reliably erase a prepared underdrawing without affecting the surface, and turning the canvas changes orientation but does not protect the lines.

Correct answer: C. It provides even adhesion and controlled absorbency

Explanation: The governing concept is surface preparation. Gesso forms a uniform, slightly toothy ground that gives acrylic paint more even adhesion and prevents the support from absorbing the medium unpredictably. Therefore option C is correct. Gesso does not remove paint, its purpose is not merely to add weight, and it does not chemically convert acrylic into oil colour. Its value is the controlled, receptive painting surface it creates.

Correct answer: D. Using a stay-wet palette and a light water mist

Explanation: The governing concept is managing evaporation during acrylic painting. A stay-wet palette and a light mist of water slow moisture loss and extend the paint’s working time, while still avoiding excessive dilution. Option D is correct. Sunlight and heating accelerate drying, and sand changes texture rather than preserving workable paint. The mist should be light; soaking the colour could weaken its binder and alter its consistency.

Correct answer: A. A broken rough and grainy colour texture is created

Explanation: The governing concept is controlled paint loading. In dry-brush work, the brush carries very little relatively thick paint, so it skips across the surface and catches raised areas, producing broken, rough, grainy marks. Therefore option A is correct. This method does not make the surface fully transparent, cause paint to flow automatically, or dissolve a dry acrylic film in water; those effects contradict the technique.

Correct answer: B. Dry and relatively light

Explanation: A glaze is a thin, transparent acrylic layer placed over a dry underpainting. A light base reflects more light through the transparent colour, helping the result appear luminous, while a dry surface prevents unwanted mixing and muddy edges. A wet, oily, or dusty base interferes with adhesion and clarity. Consequently, option B provides the appropriate foundation for a luminous glaze.

Correct answer: C. Reducing gloss while maintaining binding strength

Explanation: Matte medium contains acrylic polymer binder with matting agents. When mixed into acrylic colour, it lowers the reflective gloss while preserving adhesion and film formation better than simply adding large amounts of water. It does not convert acrylic into oil, keep it permanently wet, or make it metallic and rigid. Therefore option C accurately states the medium’s main purpose.

Correct answer: D. The paint may remain tacky for long and the film may weaken

Explanation: The governing concept is controlled use of acrylic mediums. Retarder slows evaporation and extends working time, but adding too much can prevent the acrylic film from drying and forming its normal durable bond. The surface may stay tacky, attract dust, or become weaker than intended. Option D is therefore correct. Excess retarder does not instantly harden the paint, bleach it white, or shrink the canvas to half its size.

Correct answer: A. With lower contrast and lighter cooler colours

Explanation: The governing concept is atmospheric perspective. Air between the viewer and a distant object reduces contrast and detail, while atmospheric light often makes distant colours appear lighter, cooler, and less intense. Option A applies these principles and creates a convincing sense of recession. Very dark hard outlines, brilliant warm colours, and heavy raised texture usually increase visual prominence and make an object appear nearer rather than farther away.

Correct answer: B. More detail, strong contrast and clear edges

Explanation: The governing concept is visual depth through atmospheric and compositional contrast. Foreground objects appear closer when they have sharper edges, stronger light-dark or colour contrast, and more observable detail. Thus option B is correct. Blurred edges and reduced detail suggest distance, a uniform grey surface removes useful depth cues, and a thick varnish layer changes the finish rather than establishing spatial position.

Correct answer: C. Establishing basic values and light-shadow relationships

Explanation: The governing concept is structural planning through an initial paint layer. Underpainting establishes the broad composition, major light-dark values, and basic colour relationships before surface details are added. It helps the artist judge depth and unify later layers. Therefore option C is correct. Underpainting is not a varnish-removal step, does not harden brush bristles, and is never intended to dissolve the finished artwork in water.

Correct answer: A. Lightly roughening the surface and applying a suitable primer

Explanation: The governing concept is adhesion through suitable surface preparation. Smooth plastic is non-absorbent, so acrylic may peel or scratch away if applied directly. Light abrasion creates a microscopic key, and a compatible primer provides a better bonding surface for the paint. Therefore option A is correct. Cooking oil contaminates the surface, plastic does not dissolve in water, and salt does not reliably improve acrylic adhesion.