Colour filling and blending

The governing design principle is the balance between repetition and variety. Repeated colours can create rhythm, but exact repetition at every point becomes monotonous and mechanical. Small, intentional changes in colour, scale, spacing, or intensity preserve unity while adding movement and visual interest. Therefore option D is correct. Removing colours or using one colour reduces variety, while making repetition more identical increases monotony.

The governing concept is holistic evaluation. A successful filled or blended area is not judged by brightness or colour count alone; it must be even where required, controlled at the edges, smoothly graduated in tone, suitable for the surface and medium, and appropriate to the image’s purpose. Thus option B is the most comprehensive criterion. The other choices isolate one minor feature and cannot represent overall quality.

The governing concept is controlling moisture and paint load during blending. When the surface is too wet and the brush carries too much colour, the middle mixture travels rapidly and covers the neighbouring colours instead of forming a gradual transition. Removing excess moisture and loading the brush lightly restores control. Therefore option B is correct. More water, heavier pressure, or black paint would worsen the spreading or hide the problem.

The governing principle of an even fill is to maintain a wet edge: each new stroke should slightly overlap the still-wet edge of the previous stroke. If the edge dries before joining, the next stroke settles as a separate band, creating visible lap marks. Therefore, option C is correct. Excess water or changing consistency may also cause unevenness, but neither most directly explains a boundary after every stroke.

A smooth dark-to-light gradation requires the pigment-to-water ratio to change gradually. When too much water is added in one step, the pigment becomes suddenly diluted, so the middle loses value and appears much lighter than the surrounding sections. Thus option D is correct. A small brush mainly affects coverage, white paper is expected in a transparent wash, and excess dark colour would make an area darker rather than suddenly pale.

The governing concept is that blending creates smooth transitions, but form is created by a purposeful value pattern. A circular object needs a light area, a gradual halftone transition, and a darker turning side arranged according to the light direction. Therefore, option A is most effective. One uniform value removes volume, a thick outline gives a graphic edge rather than roundness, and random white dots do not establish consistent light and shadow.

Complementary colours contain strongly contrasting colour relationships, so excessive physical mixing can reduce chromatic clarity and produce a dull or muddy neutral. The best technique is limited overlap with a clean, well-controlled brush, stopping before the pigments are overworked. Option B is correct. Long rubbing increases mixing, black lowers brightness, and excess water can cause blooms or uneven dilution rather than a clean boundary.

In an even colour fill, repeated passes should not accumulate at the boundary. If the painter repeatedly retouches the edges, a second or thicker pigment layer forms there, increasing the local value and making the edges look darker than the centre. Thus option C is the most likely cause. Excess water in the centre may make it lighter, but paper thickness and a new brush do not directly create a darker double layer at the edges.

A water bloom occurs when excess clean water enters a still-damp painted area. The water pushes and redistributes the wet pigment toward the edge, leaving a pale centre or ring-like mark as the area dries. Therefore, option D is correct. Brush size, pigment darkness, and an outline do not provide the moisture imbalance needed to create this circular bloom. After rinsing, the brush should be lightly blotted before blending.

A graded wash depends on an even, controlled movement of diluted pigment. If colour pools at the lower edge, it may dry into a dark bead or patch and interrupt the value transition. A clean, slightly damp brush can gently absorb or lift the excess before it dries, so option A is correct. Adding more pigment worsens the pool, rubbing damages the paper, and forced drying cannot redistribute the pigment evenly.

Uniform filling requires consistency in both hue and dilution across the whole area. Preparing a sufficient quantity of the mixture beforehand allows the artist to use the same colour and paint consistency from one section to the next. Therefore, option B is correct. Making new mixtures invites small hue differences, continuously adding water changes dilution, and a dry brush does not solve inconsistent colour preparation.

Dark pigment has a strong effect on the value and can overwhelm a light passage after only a few strokes. The governing blending principle is to preserve control by adding the dark colour gradually in small amounts, checking the transition after each addition. Thus option C is correct. Applying it heavily first destroys the light area, fully drying both colours prevents smooth wet blending, and removing the light colour reverses the required correction.

A cube is an angular form made of distinct planar faces, so its structure is communicated through separate values and clear boundaries rather than continuous rounded shading. Give each visible face a different, nearly even value according to the light direction and keep the edges readable. Therefore, option D is correct. One value removes plane contrast, erased edges weaken structure, and circular strokes suggest a rounded form instead of a cube.

The governing concept is protecting a dry lower layer during glazing. Repeated brushing over one spot can re-wet, disturb, or lift the underlying paint, especially before it has fully set. A light upper colour, a warm hue, or large paper size does not by itself cause lifting. Use limited, gentle strokes over a dry surface, so option B is correct.

The governing concept is controlled colour blending, especially when colours are close to complementary opposites. Yellow and violet can become dull or muddy when scrubbed directly together in equal strength. Placing a warm intermediate such as orange or red between them creates a gradual transition and preserves the sunset glow. Option C is therefore correct. Black would dirty the passage, while mixing all colours destroys colour clarity.

The governing concept is a smooth value transition in a wash. When paint remains damp, light overlapping strokes can soften the boundary between adjacent colours before it dries into a hard band. Option D is correct because it combines suitable timing, pressure and movement. Dark outlines exaggerate the bands, dots create unwanted texture, and a dry second coat usually cannot remove the original abrupt edges.

The governing concept is material-based rendering: different surfaces need different edge and value treatment. Polished metal reflects light in strong, concentrated changes, so bright highlights may sit beside dark areas with relatively sharp boundaries. If every transition is softened equally, the contrast becomes weak and the object looks like cloth or plastic. Option A is correct; the other choices make false claims about colour and transparency.

The governing concept is that colour treatment should communicate surface texture. Velvet absorbs and reflects light softly, producing deep rich areas, gentle highlights and gradual value changes rather than a uniformly flat fill. Option B is correct because it combines saturated depth with controlled soft transitions. A flat colour removes form, hard white lines look artificial, and random splashes do not describe the ordered folds or pile of velvet.

The governing concept is to represent a material according to how it interacts with light. Glass allows background colours and light to influence its appearance, while highlights, edges and limited tonal areas suggest its form. A uniform opaque fill blocks those relationships, so the object loses transparency and looks like a solid painted shape. Option C is correct; the other options either claim the opposite or are unrelated to glass rendering.

The governing concept is controlled layering. Each additional coat deposits or concentrates more pigment, so repeated correction can make one area darker and visually uneven. Option D is best: while the paint is damp, limited lifting may remove excess colour, or one carefully planned layer can correct the value without buildup. Adding more paint, using only a dry cloth, or applying black worsens the imbalance rather than solving it.

The governing concept is controlled colour lifting and brush loading. During lifting, the brush absorbs pigment and water; if it is returned without being rinsed or blotted, that loaded pigment can be released onto the same or another area. Option B is correct because the correction may be reversed or produce a stain. The other choices do not describe the direct consequence of carrying wet pigment on the brush.

The governing design principle is unity with emphasis. A related palette keeps the parts visually connected, while a controlled difference in value or saturation makes the focal figure stand out without breaking harmony. Using unrelated colours everywhere creates disorder; one value removes hierarchy, and leaving the figure uncoloured is not a dependable emphasis strategy. Therefore option A gives the best balance between cohesion and focal contrast.

High-quality colour filling is judged by technique and visual purpose, not by brightness alone. Even coverage, clean boundaries, smooth but controlled transitions, and intentional light-dark values show that the artist manages pigment, moisture, edges, and emphasis. Excess water weakens control, and mixing every colour destroys separation. Thus option B is the most complete and reliable criterion; bright colours may be suitable in one work but are not proof of quality.

The governing technique is a continuous wet edge in a flat wash. When the next stroke meets the previous stroke while both are still workable, the paint joins and levels more evenly, reducing visible bands, tide marks, and hard overlaps. The painter should work steadily, reload consistently, and avoid long pauses. A wet edge is not intended to create an outline, dry paint quickly, or stiffen the brush. Therefore option C is correct.

The governing concept in a graded wash is a gradual change of value through consistent control of pigment, water, and stroke overlap. If one stage uses a more concentrated mixture, that section deposits extra pigment and creates a sudden dark band instead of a smooth transition. A slight tilt may guide flow, cleaning the brush reduces contamination, and even pressure usually supports consistency. Therefore option A is the most likely cause.