Colour filling and blending

The governing concept is tonal modelling. A rounded form normally needs a highlight, a middle value, and a shadow so the eye can read a gradual change across its volume. Without the midtone, the jump from light to dark is abrupt; therefore B is correct and the fruit may look cut out, flat, or harsh. The surface does not become transparent, and poster colours do not automatically blend into an even tone.

The governing concept is moisture control in wet-on-damp painting. A very wet brush adds excess water to an already damp surface, lowering the paint’s control and carrying pigment into nearby areas. This can create irregular patches, streaks, or pools, especially near edges, so option A is correct. A carefully moist brush may support blending, but excessive water does not automatically improve it; it also cannot make paint dry immediately or become more opaque without pigment.

The governing concept is even paint distribution. When a large painted area dries unevenly, water and pigment can move toward a boundary, where material collects and leaves a darker rim. This visible defect is appropriately called unwanted edge accumulation, so option A is correct. Complementary contrast is a colour relationship, a tint is a lighter colour mixture, and colourlessness means absence of colour; none describes pigment collecting at an edge.

The governing concept is maintaining a wet edge during an even wash. Working gradually from one section into the next keeps the boundary workable, so adjacent strokes merge before they dry and pigment is less likely to collect in a dark ridge. Therefore option B is correct. Random spots and long pauses create separate drying boundaries, while adding much water at the end disturbs the surface instead of repairing it.

The governing concept is visual uniformity in a flat background. A small corrective patch is unsuitable when its value, opacity, brush texture, or edge does not match the surrounding paint; the repair then becomes another visible mark. Thus option A is correct. A dry area, a clean brush, and sufficient paint do not by themselves make patching unsuitable. A broader, evenly applied layer is usually safer for hiding the join.

Unity comes from retaining a related colour family, while variety can come from changing value, lightness, darkness, and saturation within that family. Tints add white or lightness, shades deepen the colour, and muted versions reduce intensity without breaking the scheme. Thus option B is best. Unrelated colours weaken unity, identical values reduce variety, and only black is too limited.

The governing concept is a value scale: value means the lightness or darkness of a hue. To produce five dependable steps, keep the base hue consistent and add measured, gradually increasing amounts of white for tints or black for shades. Option A is correct because measurement makes the progression controlled and repeatable. Adding unrelated colours changes the hue, water mainly changes dilution, and guesswork gives uneven results.

The governing concept is controlled flat filling: first establish a clean boundary, then cover the interior systematically with overlapping, parallel strokes and a consistent paint mixture. Option A is correct because it protects the circular edge and reduces patches or streaks. Dripping and flowing are uncontrolled, while starting outside the boundary risks spills and produces an inaccurate shape.

The governing concept is controlled colour transition. A narrow band of an intermediate or suitable transition colour can reduce the abrupt difference between two adjacent areas while preserving the identity and clarity of both. Apply it carefully, preferably after the underlying poster colour is dry, so the edge remains intentional. Pouring water can cause blotting or uncontrolled spreading, complete mixing removes the separation, and pure black usually creates an even harsher boundary rather than a soft one.

The governing concept is modelling form through value. A sphere receives different amounts of light across its curved surface, so a highlight should transition through a mid-tone into a shadow. This gradual change gives the eye evidence of volume and makes the circle appear spherical; option A is correct. An outline defines the boundary but remains flat, while dots or a changed background do not model the form.

The governing concept of a flat wash is a continuous, even tone. Keeping the paint-to-water ratio consistent means that each brush load has similar strength, while working along a connected wet edge helps prevent streaks and hard patches. Thus option A is correct. Changing colour destroys uniformity, allowing the paper to dry between strokes creates visible overlaps, and placing heavy paint in one area produces a dark patch rather than an even wash.

The governing concept is gravity-driven pooling in a watercolour wash. When a wash contains too much liquid, gravity moves the water and suspended pigment toward the lower edge; as the water evaporates, the pigment remains concentrated there and forms a darker bead or band. Therefore option B is correct. White paper does not cause pigment to collect, a clean brush usually improves control, and the size of the palette has no direct effect on the wash edge.

The governing concept is that transparent watercolour remains bright when its pigments and working water stay clean. Mixing a small number of clean colours gently avoids excessive pigment contamination and preserves luminosity. Thus B is correct. Repeatedly combining many colours can create a dull, muddy mixture; adding black generally lowers brightness, dirty water contaminates washes, and rubbing a wet surface can disturb the paper and weaken the painted layer.

The governing concept of a flat wash is maintaining a consistent supply of similarly diluted colour across the area. Prepare enough mixture before beginning, keep the paper positioned appropriately, and work with continuous, overlapping strokes while the edge remains workable. A is correct because it reduces visible bands and interruptions. Changing water with every stroke is impractical, a very dry brush produces patchiness, and folding the paper cannot create an even wash.

The governing concept is value control through dilution. To begin a graded wash lightly, use more water and less pigment; as the wash progresses, increase pigment concentration or reduce the amount of water so the value becomes gradually darker. Therefore B is correct. Paper size, the brush’s name, and the palette’s colour do not directly control the light-to-dark value change. The transition should remain gradual rather than abrupt.

The governing concept is a graded watercolour wash, in which pigment strength changes gradually across the surface. Increasing the water content toward the bottom dilutes the pigment, so the value becomes progressively lighter while the transition remains smooth. Option C is correct. Adding black would lower the value and make the area darker, while an equally strong wash would not create a lightening effect. Oil is unsuitable for this water-based technique.

The governing concept of a monochromatic exercise is value development within one hue. By using more or less water, and sometimes varying pigment concentration, the artist creates a sequence from light to dark without relying on many colours. Option A is correct because this isolates control of water, transparency, tone and value transitions. The exercise is not mainly about memorising colour names, cutting paper or preparing oil paint.

The wet-on-wet method applies watercolour to a damp surface, allowing neighbouring pigments to move into one another and form a soft transition. Option A is correct because the moisture reduces a sharp boundary when the two colours meet. Wet-on-dry generally creates clearer edges, while dry brush leaves broken texture and scratching removes or disturbs paint rather than blending it smoothly.

The governing concept is a variegated wash, in which two or more wet colours are placed next to one another and allowed to flow or merge slightly while the paper is still damp. The result is a controlled change of colour across the area. B is correct. A monochrome wash uses one hue, dry scraping is a surface action, and line drawing depends on marks rather than flowing colour.

Soft blending depends on allowing neighbouring colours to merge before the paint film sets. With acrylic colour, the most useful moment is while both colours are still wet, because the brush can soften the boundary and create a gradual transition. Thus option B is correct. Once the paint has dried, direct blending becomes difficult and may require another thin layer. Varnishing or folding the canvas does not create a colour blend and may damage the work.

The governing principle is emphasis through contrast. A focal point attracts attention when nearby colours, values, or edges differ noticeably, while saturation makes the area visually stronger. Therefore, local strong contrast and saturated colour guide the viewer’s eye to the intended centre. Equal contrast everywhere gives all areas similar importance, and merely making the centre lightest is not always effective without surrounding contrast.

The governing concept is gradual change in value or colour intensity. A gradation moves smoothly from light to dark, or from a weaker mixture to a stronger one, so the amount of white or dark colour should be changed in small steps. Unrelated bands and unblended patches interrupt continuity, while scratching dry paper is a surface-treatment method rather than a way to form an acrylic colour transition.

A smooth gradation follows the principle of continuous tonal transition. When two neighbouring values differ too sharply, an intermediate value placed between them reduces the size of the tonal jump and makes the passage smoother. Adding more black usually increases the contrast, while erasing the entire area is unnecessary and sand changes texture rather than correcting value progression.

Acrylic paint dries quickly, so soft blending depends on managing working time and moisture. Working in a small area and keeping the adjoining edge slightly moist allows the colours to meet and blend before the film sets. A thick dry layer, a dry brush, or sunlight reduces control and can make blending harder. Moisture should be controlled rather than excessive, because too much water can weaken the paint film.

The governing concept is controlled blending. Repeated brushing while acrylic colours are still wet can overmix pigments, reducing colour clarity and producing a muddy or dull result. Continued friction may also disturb the paint film and leave an uneven surface or visible unwanted marks. More blending does not automatically increase brightness, opacity, or drying speed; a few deliberate strokes usually preserve cleaner colour.