Acrylic colour

The governing concept is edge control and gradual colour transition. A hard edge can be softened by gently working the neighbouring colours together while the acrylic layer is still workable, creating a less abrupt boundary. Option B is correct because it directly changes the transition between forms. Cutting the surface, adding glue, or folding the canvas damages the support and cannot create a controlled painted edge.

The governing concept is tool-based texture, especially impasto. A palette knife spreads acrylic in broad, relatively flat deposits and can leave raised ridges or broken marks because it does not behave like a soft detail brush. Therefore option C is correct: the method commonly produces thick strokes and visible texture. A transparent watery wash, hair-fine lines, or disappearing colour are not normal results of palette-knife application.

The governing concept is stippling, a texturing method that builds an image from separate dots or short dabs. Closely spaced marks create a granular or speckled surface, while changes in dot size and density suggest light, shadow, and form. Therefore, option B is correct. Long flowing streaks belong to directional strokes, a smooth mirror surface comes from continuous blending, and straight geometric lines are produced by deliberate line work.

The governing concept is the functional effect of an acrylic medium. Gloss medium increases the reflective sheen of the dried paint and can make the mixture more transparent, depending on the proportion used. It modifies the appearance and handling of the colour; it does not make paint magnetic, stop acrylic from drying, or turn the canvas transparent. Therefore, option A is the only correct answer.

The governing concept is even application, or flat coverage. A suitable broad brush distributes paint more consistently, while an even mixture and controlled strokes in one direction reduce visible overlaps. Working across a still-wet edge also helps prevent bands and patchy joins. Option B is correct. Repeated dry brushing creates marks, soil contaminates the paint, and washing after every stroke interrupts adhesion and produces an uneven surface.

The governing concept is surface preparation and adhesion. Paint bonds best when it contacts a clean, suitably prepared ground. Dust acts as a loose intermediate layer, preventing direct contact between acrylic and the surface; it can cause weak adhesion, small bumps, pinholes, or an uneven finish. Option D is correct. Dust does not increase transparency or painting size, and it cannot restore or renew a brush.

The governing concept is light reflection. Acrylic containing metallic pigments has particles that reflect light and produce the characteristic sheen of metal. Applying it with a consistent light direction, then adding controlled highlights and darker areas, helps describe the form convincingly. Therefore option A is correct. Water added to black only dilutes it, salt creates an unwanted texture, and boiling can damage the paint rather than create a metallic surface.

The governing concept is monoprint transfer: paint is placed on a smooth, non-absorbent surface and paper is pressed onto it to receive one distinctive impression. Acrylic can create varied marks because paint thickness, pressure, and timing affect the transfer. Option D is correct because it describes this direct one-time printing process. Burning the canvas, adding kerosene, or cutting a brush does not produce a controlled monoprint effect.

Reflected light is light bounced from a nearby surface into a shadow, so it usually carries a restrained influence of that surface’s colour. The reflected-light accent should remain weaker and darker than the main light; otherwise the form loses its believable lighting. Option B is correct because it uses a subtle surrounding-colour note. Solid black, white coverage, or removing the shadow ignores the concept.

Value means the relative lightness or darkness of areas, independent of their hue. A small black-and-white study simplifies the planned image into light, middle, and dark shapes, making the composition and focal emphasis easier to judge before colour is added. Option C is correct because it directly rehearses value organization. Writing colour names, varnishing early, or soaking canvas does not plan values.

Edge control is a representational principle: sharp edges attract attention and describe clear separation, while soft or lost edges suggest turning form, atmosphere, or reduced focus. If every boundary is equally hard, the eye receives the same emphasis everywhere and depth is weakened. Option D is correct because the painting may look flat and artificial. The other choices are not normal results of hard edges.

Colour harmony is the visual sense that colours belong together rather than competing randomly. A limited palette, with a recurring shared colour or related mixtures, creates links across separate areas and keeps the painting unified. Option A is correct because common colour relationships support harmony without removing variety. Unrelated pure colours weaken unity, equal black can dull colours unpredictably, and white alone cannot provide a complete colour structure.

Highlights are the lightest accents and are most effective when placed after the larger colour and value relationships have been established. Applying them late keeps them visually clean, protects the intended light direction, and helps guide attention toward a focal area. Option B is correct. Acrylic highlights do not dissolve all lower layers, create transparency by themselves, or alter the canvas size; they should still be used selectively rather than everywhere.

A completed painting should be judged through both formal design and technical execution. Review the composition, value structure, colour relationships, edge variation, surface texture, focal point, and overall visual unity. This combined check reveals whether the image reads clearly and whether technique supports the idea. Option C is correct because it is holistic. Cost, brush count, or folding the work cannot evaluate its artistic quality.

Acrylic paint depends on an acrylic polymer binder to hold pigment together and attach the dried film to the surface. Adding excessive water can spread that binder too thin, so the layer may become weak, chalky, or poorly attached, especially on an unsuitable ground. Therefore option C is correct. Water does not raise paint temperature, turn pigment metallic, or enlarge the canvas; an acrylic medium is safer when substantial dilution is needed.

The governing principle is that working time and binder strength should be controlled together. A purpose-made slow-drying or open-time medium can delay surface drying while retaining the acrylic binder and film-forming properties, provided the label ratio is followed. Thus option D is correct. Excess water can weaken adhesion, sand changes texture, and direct sunlight speeds drying rather than extending blending time.

A glaze should be brushed gently over a stable, dry underlying layer. If that layer is still partly wet or soft, the new brushwork can re-wet and disturb it; pigment may lift, become streaky, and mix into the transparent glaze. Therefore option B is correct. Brightness is not automatic, and an unfinished layer cannot harden the surface into stone or clean the brush. Allowing each layer to dry prevents this problem.

Gesso creates a prepared ground, but brush or application marks can leave small ridges and an uneven texture. Once the gesso is fully dry, light sanding reduces those unwanted high points and produces a smoother, more consistent surface for detailed acrylic brushwork. Option A is correct. Sanding does not change acrylic into oil paint, keep the canvas wet, or remove pigment from a painting; dust should be removed before painting.

Acrylic paint needs a clean, compatible surface so its polymer film can make reliable contact and dry with adequate adhesion. Very smooth, non-absorbent materials may resist the paint; cleaning removes grease and dust, while a suitable primer or mild abrasion provides an appropriate tooth. Option B is correct. Oil and wax create adhesion barriers, and soaking the surface in water does not prepare a stable painting ground.

The governing concept is complementary contrast: opposite colours on the colour wheel intensify one another when seen together. If a later layer is thin or selectively applied, tiny areas of the complementary underpainting can remain visible and make the surface appear more lively. Therefore, option C is correct. The other choices describe no normal effect of complementary underpainting.

Value means the relative lightness or darkness of a colour, whereas hue identifies its colour family. A monochromatic underpainting reduces hue distraction, so the artist can arrange highlights, middle values and shadows first. This strong light-and-dark foundation makes later colour application more convincing, which is why option D is correct; the other choices are unrelated technical effects.

Local colour is the colour we associate with an object under neutral conditions, such as the basic green of a leaf. The colour actually observed can shift because of the light source, nearby reflected colours and shadow. Thus option A correctly distinguishes the two. Options B, C and D incorrectly treat colour as fixed or limited to one value.

Reflected light is light bounced from a nearby surface into a shadow, so it can gently raise the shadow value and add colour variation. It must remain weaker than the directly lit area; otherwise the form loses its clear lighting hierarchy. Option B states this rule. A, C and D exaggerate or misrepresent reflected light and would flatten the form.

Surface reflection is the governing concept. A metallic surface reflects its surroundings more directly, producing sharper highlights, stronger dark-light changes and sometimes clear reflected shapes. A matte surface scatters light, so its transitions are generally broader and softer. Therefore option C is correct. A, B and D ignore how surface texture affects reflected light and shadow.

A water reflection is affected by ripples, viewing angle, depth, reflected sky colour and the movement of the surface. These factors interrupt the object's shape, soften or shift its value and often stretch it into horizontal fragments. Thus option A is correct. Reflections are not automatically black, white or more solid than the objects they represent.