Brush techniques

The governing concept is using the geometry of a tool to control an edge. A flat brush has a straight side that can be aligned for one horizontal or vertical edge, then repositioned carefully to meet it and form a clean right angle. Circular movement and fan-brush dabbing create irregular marks, while a very wet surface lets paint spread beyond the intended boundary. Thus, controlled use of the flat brush’s straight edge makes option A correct.

The governing concept of a ribbon stroke is continuous modulation. Its width depends on how pressure, brush angle, and movement speed change together along the curve. These controls must be adjusted gradually; an abrupt change in any one of them produces a sudden jump in width or a broken-looking ribbon. Colour naming, paper length, and ferrule colour have no effect on stroke width. Therefore, option B identifies the missing control.

The governing concept is controlled opacity and broken surface coverage. A light colour mixed with little water can sit visibly over a dark ground, while dry-brush or scumbling deposits discontinuous marks that reveal some of the underlayer and create texture. A watery wash or transparent glaze mainly allows the dark area to show through smoothly, and complete wet blending removes the textured separation. Therefore, option C is correct.

The governing concept is pressure release at the end of a tapered stroke. If the brush stops while still pressed against the surface, paint continues to collect at one point, producing a rounded blot instead of a fine branch tip. A gentle, timely lift normally narrows the mark; sufficient paint is not itself a fault, and dry paper usually does not create this specific deposit. Thus, option D is the main cause.

The governing concept of a graded wash is a controlled change in pigment concentration supported by smooth timing between adjacent strokes. Starting with a lighter mixture and gradually increasing pigment creates the tonal transition; joining edges while they are still damp prevents visible bands. Option A is correct. Drying every band creates hard divisions, a harder brush cannot solve the tonal problem, and one dark colour removes the required gradation.

Brush movement must follow the visual character of the subject. Long upward pulls separate the fan bristles into lines, which resembles grass. Clouds require broken, rounded masses with soft boundaries, so light circular dabs and gentle edge blending make option C correct. More pulling or pressure would strengthen the grass-like marks, while dark green changes colour rather than correcting the texture.

Depth is governed by the relationship between light, shadow, value, and surface texture. Broken lighter strokes can suggest planes catching light, while controlled darker strokes describe the recessed or shadowed planes. Therefore option D provides both tonal contrast and textural variation. An equal wash removes volume, an outline gives only a flat boundary, and blurring every edge weakens the rock’s structure.

Visual rhythm depends on repetition, but effective composition also requires controlled variation. Slight changes in stroke size, direction, length, or spacing keep the eye moving while preserving unity. Option A is correct because it balances order with interest. Making every mark identical increases mechanical monotony; removing colour or repeating one dot does not address the lack of variety in the brushwork.

Calligraphic brushwork depends on a repeatable sequence of pressure, angle, direction, and movement speed. Slowly repeating the planned pressure and angle changes in one direction helps the hand connect thick and thin sections consistently, so option B is correct. More paint affects coverage, not control; changing brushes prevents stable practice; and a tight grip reduces smooth movement and sensitivity.

Transparent layering depends on allowing each wash to set before another layer is applied. Once the first layer is fully dry, a light, deliberate second application with fewer strokes reduces friction and prevents reactivating or lifting the pigment. Option C is correct. A harder brush and pressure worsen abrasion, continuous wetness keeps the layer vulnerable, and scraping damages the paper and paint.

Paper fibres weaken when the sheet is wet, and repeated forceful scrubbing mechanically raises those fibres, producing a fuzzy or damaged surface. Option D identifies both necessary causes: moisture and excessive abrasion. Clean water, a light soft brush, and preparing colour beforehand do not normally disturb the paper surface. The correction is to reduce pressure and repeated passes, especially while the paper is damp.

A flat brush makes a broad one-stroke shape only when its face carries enough paint and remains evenly connected with the paper. If the load is insufficient or the brush tilts onto an edge, the centre receives little pigment and a gap appears. Option A is correct. Using only the edge narrows the mark, holding the brush above the surface deposits nothing, and scratching cannot repair the application.

The systematic study of brush texture requires isolating controllable variables. Pressure changes the width and strength of a mark, angle changes contact shape, moisture changes flow and softness, and speed changes drag and continuity. Making a sample chart while changing one variable at a time makes the results comparable, so option B is correct. Colour alone does not alter the physical mark sufficiently.

The governing concept is that brushwork should communicate the physical character of a material. Metal usually shows relatively sharp, continuous highlights because it reflects light, whereas wood is identified by directional, uneven grain and softer changes. Therefore, option C is correct. Option A reverses these visual cues, while B ignores material differences and D removes useful tonal information.

The governing concept is controlled contrast: a shiny surface is suggested by a relatively small, bright highlight with a readable edge against surrounding tones. Option D concentrates the reflected light and makes the form appear glossy. Spreading it or blurring every edge weakens contrast, while painting the whole object white removes the modelling needed to show shine.

The governing concept in an even wash is maintaining a continuous wet edge. If one stroke dries before the next overlaps it, the boundary remains visible and produces bands or patchy transitions. Thus option A identifies the error: the painter waited too long. Preparing enough paint may help, but it does not itself create a dried edge; brush size and paper angle are not the main cause.

The governing concept is compositional balance: visual movement created by diagonal strokes can be counterweighted by strokes moving in another direction or by quieter areas with less activity. Option B preserves the energy while stabilising the whole design. Erasing everything is unnecessary, darkening colour does not automatically correct directional weight, and changing the brush alone cannot solve a compositional problem.

The governing concept is lifting: a clean, slightly damp brush absorbs some wet pigment without adding another colour. By touching, lifting and cleaning the brush repeatedly, the painter can reduce value gradually and precisely, so option C is correct. Darker paint increases the problem, hard rubbing can damage the surface, and oil is unsuitable for controlled water-based correction.

The governing concept is brush cleanliness during lifting. After the bristles absorb pigment, they are no longer clean; if they are not rinsed and blotted, the next touch can redeposit that pigment. Therefore option D is correct. A new brush is not automatically dirty, white paper does not cause re-deposition, and handle weight has no effect on the colour held by the bristles.

The governing concept is edge variety. Hard edges attract attention and separate forms, but if every edge has equal sharpness, no area recedes and no focal hierarchy is created. The objects may therefore look cut out and equally near, making option A correct. Hard edges do not automatically create depth, do not change opacity, and cannot make the entire painting blurred.

The governing concept is emphasis through selective edge control. Clear, sharper edges in important parts of the subject attract the eye, while softer edges elsewhere reduce competition and preserve visual hierarchy. Thus option B is most effective. Blurring the subject hides it, identical edges give every area equal importance, and a black outline may look artificial rather than creating convincing emphasis.

The governing concept is directional brushwork: strokes should reinforce the curves, planes or structural direction of the object. If they ignore that form, correct light and shadow colours may still look pasted on, so option C is the plausible cause. Paint price and paper shape do not determine volume, while a clean brush generally supports control rather than flattening the object.

The governing concept is controlled layering and surface texture. Repeated passes with a very soft brush can disturb thick opaque paint, mix neighbouring colours excessively and erase useful brush texture. Therefore option D is correct: the surface may become muddy and unnaturally smooth. The other choices describe impossible or unrelated effects; repeated soft brushing does not instantly make paint transparent, turn a brush into metal, or remove the paper.

The governing concept is controlled practice and isolation of variables. If pressure, brush angle, speed and moisture all change at once, a different result may be caused by any one of them or by their interaction. The learner cannot compare trials reliably or identify what to repeat. Thus option A is correct. The brush does not always break, paint does not stop drying by definition, and paper size is unrelated to this learning problem.

The governing concept is atmospheric or spatial depth through edge and stroke clarity. Foreground forms are normally shown with clearer, stronger marks, while distant background forms are softened and simplified. Reversing that relationship makes the background compete for attention and causes the scene’s distance to look confused or inverted. Therefore option B is correct. Stroke clarity cannot make colours shine automatically, turn every object transparent, or change the paper’s thickness.