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Andalusia PAU Graphic-Plastic Expression Techniques study materials
Andalusia PAU Graphic-Plastic Expression Techniques study resources

Andalusia PAU Graphic-Plastic Expression Techniques practice questions

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Question 1Graphic-plastic expression: materials, image-making and project evidence

In the standard graphite pencil hardness scale, which designation represents the hardest lead with the highest clay-to-graphite ratio?

  1. 9H Correct answer.
  2. 9B
  3. HB
  4. 2B

Explanation

The 'H' scale stands for hardness, with numbers ranging from H up to 9H indicating increasing hardness and higher clay proportions. Pencils designated as 9H contain the maximum clay content, producing very fine, pale, and scratch-resistant lines. In contrast, 'B' designates blackness and softness.

Question 2Graphic-plastic expression: materials, image-making and project evidence

Which dry drawing medium is produced by baking willow twigs in an airtight kiln without oxygen?

  1. Willow charcoal Correct answer.
  2. Compressed charcoal
  3. Graphite powder
  4. Sanguine crayon

Explanation

Willow charcoal (carboncillo vegetal) is created by burning willow twigs in a low-oxygen kiln, resulting in a soft, velvety carbon stick. It rubs off paper easily, making it ideal for preliminary layout sketches and soft tonal smudging. Compressed charcoal, by contrast, includes a binding agent.

Question 3Graphic-plastic expression: materials, image-making and project evidence

Sanguine is a traditional dry drawing medium recognized for its rich reddish-brown color. Which pigment gives sanguine its characteristic hue?

  1. Red iron oxide (hematite) Correct answer.
  2. Cadmium red
  3. Burnt umber
  4. Raw sienna

Explanation

Sanguine (sanguina) derives its natural reddish-brown tone from hematite or red iron oxide (Fe₂O₃). Used extensively during the Renaissance by masters like Leonardo da Vinci and Michelangelo, sanguine excels at rendering human flesh tones and anatomical warm shading.

Question 4Graphic-plastic expression: materials, image-making and project evidence

What is the primary function of applying a fixative spray to a completed charcoal or soft pastel drawing?

  1. To bind loose pigment particles to paper and prevent smudging Correct answer.
  2. To increase the gloss levels of the paper support
  3. To permanently dissolve charcoal into a liquid paint layer
  4. To alter the natural pigment hue to a darker shade

Explanation

Fixative spray consists of resin dissolved in alcohol or solvent that coats loose dry particles, binding them firmly to paper fibers to stop dust shedding and smudging. While heavy application may slightly alter value contrast, its core purpose is protective preservation.

Question 5Graphic-plastic expression: materials, image-making and project evidence

How is paper weight standardly measured and expressed in international art specifications?

  1. Grams per square meter (g/m² or gsm) Correct answer.
  2. Millimeters of paper thickness
  3. Total weight per hundred sheets in kilograms
  4. Pounds per linear yard

Explanation

Paper weight is universally measured in grams per square meter (g/m² or gsm). Standard drawing paper ranges from 90 to 180 g/m², while wet media like watercolor require heavy papers of 300 g/m² or higher to resist warping without stretching.

Question 6Graphic-plastic expression: materials, image-making and project evidence

Which surface finish of watercolor paper is passed through polished heated metal rollers during manufacturing, resulting in an exceptionally smooth texture?

  1. Hot-pressed (Satinada) Correct answer.
  2. Cold-pressed (Not)
  3. Rough (Torchon)
  4. Unsized raw cotton

Explanation

Hot-pressed paper (papel satinado) is pressed under heated metal cylinders, producing a dense, slick surface with practically no tooth. It is ideal for fine pen-and-ink detail, botanical illustrations, and smooth graphic washes.

Question 7Graphic-plastic expression: materials, image-making and project evidence

Traditional waterproof Indian ink (tinta china) consists of carbon black particles suspended in water along with which binding binder?

  1. Shellac Correct answer.
  2. Linseed oil
  3. Egg yolk
  4. Beeswax

Explanation

Indian ink combines fine carbon soot (lampblack) with an alkaline shellac binder solution. Once dry, shellac forms a water-resistant, durable film that prevents the ink from bleeding or re-dissolving when subsequent washes are laid over it.

Question 8Graphic-plastic expression: materials, image-making and project evidence

What is the primary water-soluble natural binder used in professional watercolor paints?

  1. Gum arabic Correct answer.
  2. Casein
  3. Acrylic polymer
  4. Rosin resin

Explanation

Gum arabic, derived from the hardened sap of Acacia trees, is the standard binder for watercolor. It dissolves readily in water, binds fine pigment particles to paper, and allows dry watercolor paint films to re-hydrate upon contact with water.

Question 9Graphic-plastic expression: materials, image-making and project evidence

What structural component distinguishes gouache (tempera) from transparent watercolor?

  1. Addition of white inert pigment (chalk/calcium carbonate) for opacity Correct answer.
  2. Use of synthetic oil binders instead of water
  3. Requirement of hot heat-curing after application
  4. Complete insolubility in water once dry

Explanation

Gouache contains pigment, gum arabic binder, and an added chalk or white pigment filler (calcium carbonate). This inert white filler creates a velvety, opaque body color (guache/tempera) that covers underlying layers completely.

Question 10Graphic-plastic expression: materials, image-making and project evidence

Which synthetic resin emulsion acts as the binder in modern acrylic paints?

  1. Polymethyl methacrylate / Acrylic polymer emulsion Correct answer.
  2. Nitrocellulose lacquers
  3. Polyvinyl acetate glue
  4. Polyurethane foam resin

Explanation

Acrylic paints feature pigments suspended in an acrylic polymer emulsion (synthetic resin dispersion). As water evaporates, the polymer particles coalesce into a flexible, tough, waterproof film that cannot be re-dissolved in water.

Question 11Graphic-plastic expression: materials, image-making and project evidence

Which solvent is traditionally used in oil painting to thin paint consistency and clean brushes?

  1. Turpentine (Esencia de trementina) or mineral spirits Correct answer.
  2. Denatured ethanol
  3. Distilled water
  4. Acetone

Explanation

Turpentine (distilled pine resin) and odorless mineral spirits (OMS) are organic solvents capable of dissolving drying oils and resins in oil painting. They are used to thin initial oil paint layers and dissolve oil residues during brush washing.

Question 12Graphic-plastic expression: materials, image-making and project evidence

What does the fundamental oil painting rule 'fat over lean' (graso sobre magro) mandate?

  1. Upper paint layers must contain a higher proportion of oil relative to lower layers Correct answer.
  2. Initial underpainting layers must contain maximum oil content
  3. Thick impasto must always be applied under thin solvent glazes
  4. Water-soluble paints must be layered over pure oil paints

Explanation

The 'fat over lean' rule states that successive painting layers must contain progressively more oil ('fat') and less solvent ('lean'). Because oily layers dry slower and remain more flexible, putting lean (fast-drying, rigid) paint on top of fat paint causes severe surface cracking (craquelure) and peeling.

Question 13Graphic-plastic expression: materials, image-making and project evidence

In which printmaking family is ink applied to the raised surfaces of the matrix while carved-out hollows remain uninked?

  1. Relief printing (Grabado en relieve) Correct answer.
  2. Intaglio printing (Grabado en hueco)
  3. Planographic printing (Grabado planográfico)
  4. Screen printing (Serigrafía)

Explanation

In relief printing (such as woodcut and linocut), the artist cuts away areas that should remain white. Ink is rolled onto the remaining raised surfaces, which transfer the image to paper under roller or hand pressure.

Question 14Graphic-plastic expression: materials, image-making and project evidence

Which handheld cutting tools with U-shaped and V-shaped steel blades are used to carve linoleum or wood blocks?

  1. Gouges (Gubias) Correct answer.
  2. Burins
  3. Rockers
  4. Scrapers

Explanation

Gouges (gubias) are chisel-like hand tools featuring V-shaped and U-shaped cutting edges. They allow printmakers to gouge out channels and clear broad non-printing areas from linoleum or wooden relief blocks.

Question 15Graphic-plastic expression: materials, image-making and project evidence

What is the defining mechanical feature of intaglio printmaking (calcografía)?

  1. Ink is held inside incised lines below the plate surface and transferred under high pressure Correct answer.
  2. Ink adheres to greasy drawn areas on a completely flat limestone slab
  3. Ink is pushed through exposed stencil openings using a rubber blade
  4. Ink is wiped away from grooves so only raised plate areas print

Explanation

Intaglio (calcografía) comes from the Italian 'intagliare' (to cut in). Ink is pushed into incised grooves or etched channels below the plate surface, the top plate surface is wiped clean, and heavy press pressure transfers the ink from the grooves onto damp paper.

Question 16Graphic-plastic expression: materials, image-making and project evidence

In acid-etched intaglio (aguafuerte), which chemical solution acts as the mordant to bite exposed copper or zinc metal plates?

  1. Nitric acid or ferric chloride solution Correct answer.
  2. Dilute acetic acid (vinegar)
  3. Sodium hydroxide solution
  4. Hydrochloric acid mixed with ammonia

Explanation

Etching (aguafuerte) relies on a chemical mordant such as nitric acid (HNO₃) or ferric chloride (FeCl₃). The acid bites (corrodes) exposed metal where the protective varnish ground has been scratched away by the artist's etching needle.

Question 17Graphic-plastic expression: materials, image-making and project evidence

Which characteristic physical feature produced by a sharp needle in drypoint (punta seca) creates rich, velvety blurred lines?

  1. Burr (Rebaba) Correct answer.
  2. Bevel
  3. Biting pit
  4. Registration mark

Explanation

In drypoint (punta seca), drawing directly into metal scratches up a rough ridge of displaced metal called a burr (rebaba). The burr catches additional ink along the groove edge, printing soft, dark, velvety line work.

Question 18Graphic-plastic expression: materials, image-making and project evidence

Lithography (litografía) operates on which chemical principle?

  1. Mutual repulsion between grease and water on a flat surface Correct answer.
  2. Acid dissolution of raised wooden reliefs
  3. Electrostatic attraction of toner particles to mesh
  4. Thermal expansion of resin under pressure

Explanation

Lithography is a planographic process based on the chemical antipathy of grease and water. Greasy drawing media (litho crayons/tusche) stick to stone or plate, water wets non-image areas, and oil-based ink adheres only to the greasy image.

Question 19Graphic-plastic expression: materials, image-making and project evidence

Which flexible rubber-bladed tool is used in screen printing (serigrafía) to force ink through the open mesh onto paper?

  1. Squeegee (Racleta) Correct answer.
  2. Leather brayer
  3. Burnisher
  4. Rocker

Explanation

In serigraphy (screen printing), a squeegee (racleta)-consisting of a firm rubber blade set in a handle-is pulled across the screen under pressure to push fluid ink through unblocked mesh openings onto the substrate.

Question 20Graphic-plastic expression: materials, image-making and project evidence

What defines a monoprint or monotype in printmaking?

  1. It produces a single, unique impression that cannot be replicated identically Correct answer.
  2. It allows endless identical mechanical reproduction of thousands of prints
  3. It requires a minimum edition size of 100 numbered prints
  4. It is printed without applying any ink to the matrix surface

Explanation

Monoprinting yields a single, non-repeatable print impression. Paint or ink is applied to a smooth non-porous matrix (glass, metal, acrylic) and transferred to paper, wiping away most of the original design in the process.

Question 21Graphic-plastic expression: materials, image-making and project evidence

Which three hues constitute the traditional primary colors in classic subtractive painterly color theory (RYB model)?

  1. Red, Yellow, Blue Correct answer.
  2. Cyan, Magenta, Yellow
  3. Red, Green, Blue
  4. Orange, Green, Violet

Explanation

In traditional fine art pigment theory (the RYB model popularized by Aguilonius and Itten), Red, Yellow, and Blue are classified as primary colors because they cannot be created by mixing other pigment hues.

Question 22Graphic-plastic expression: materials, image-making and project evidence

In modern four-color process printing (CMYK), what color does the letter 'K' represent?

  1. Key / Black Correct answer.
  2. Krem / Cream
  3. Kohl / Charcoal
  4. Kobal / Cobalt Blue

Explanation

In CMYK printing (Cyan, Magenta, Yellow, Key), 'K' stands for 'Key' (traditionally the key printing plate carrying black detail and structural contrast). Black ink is added because mixing C, M, and Y pigments yields a muddy brown rather than pure black.

Question 23Graphic-plastic expression: materials, image-making and project evidence

Which fundamental dimension of color refers strictly to its relative lightness or darkness, independent of its hue?

  1. Value (Luminosidad / Valor) Correct answer.
  2. Hue (Tono / Matiz)
  3. Saturation (Saturación / Croma)
  4. Temperature (Temperatura)

Explanation

Value (luminosidad o valor) measures how light or dark a color is on a scale from white to black. Grayscale photos retain value information while removing hue and saturation.

Question 24Graphic-plastic expression: materials, image-making and project evidence

Which pair of colors are complementary to each other on the traditional 12-part color wheel?

  1. Yellow and Violet Correct answer.
  2. Red and Orange
  3. Blue and Green
  4. Yellow and Green

Explanation

Complementary colors sit directly opposite each other on the chromatic circle. Yellow and Violet form a primary complementary pair (along with Red/Green and Blue/Orange), producing maximum visual contrast when placed side by side.

Question 25Graphic-plastic expression: materials, image-making and project evidence

What is visual texture (textura visual) in a two-dimensional artwork?

  1. An illusion of tactile depth created by marks, lines, or shading on a flat surface Correct answer.
  2. Physical rough relief that can be felt by running fingers over the paper
  3. Chemical erosion produced by etching acid on metal plates
  4. The physical weight of heavy cotton rag paper stock

Explanation

Visual texture (textura visual o simulada) is a 2D optical illusion of surface roughness or patterns rendered through drawing and shading techniques, appearing textured to the eye while remaining physically smooth to the touch.

Question 26Graphic-plastic expression: materials, image-making and project evidence

Which art technique directly incorporates three-dimensional physical relief and tactile texture into a two-dimensional composition?

  1. Collage (incorporating fabric, sand, or paper fragments) Correct answer.
  2. Flat watercolor wash
  3. Smooth graphite hatching
  4. Glazed oil painting thinly wiped

Explanation

Collage directly introduces tactile texture (textura táctil) into artwork by pasting real physical materials-such as coarse paper, fabric, wood veneer, or sand-onto the support, creating tangible surface variation.

Question 27Graphic-plastic expression: materials, image-making and project evidence

Which early 20th-century avant-garde movement introduced 'papier collé' and fine art collage?

  1. Cubism (Georges Braque and Pablo Picasso) Correct answer.
  2. Impressionism (Claude Monet)
  3. Neoclassicism (Jacques-Louis David)
  4. Romanticism (Eugène Delacroix)

Explanation

Synthetic Cubists Georges Braque and Pablo Picasso pioneered papier collé and collage around 1912 (e.g. Picasso's 'Still Life with Chair Caning'), gluing oilcloth, newspaper clippings, and wallpaper directly into fine art compositions.

Question 28Graphic-plastic expression: materials, image-making and project evidence

What is the key mechanism of the 'frottage' technique, popularized by Surrealist artist Max Ernst?

  1. Placing paper over a textured object and rubbing dry graphite or charcoal across it Correct answer.
  2. Scraping wet oil paint off canvas with a razor blade
  3. Dipping paper into water covered with floating oil ink
  4. Burning holes into wooden panels with hot soldering irons

Explanation

Frottage (from French 'frotter', to rub) involves placing thin paper over a textured surface (such as floorboards, leaves, or mesh) and rubbing a dry drawing medium across the paper to capture the underlying texture.

Question 29Graphic-plastic expression: materials, image-making and project evidence

What is the primary function of preparing a wooden or canvas support with gesso (imprimación)?

  1. To seal porous fibers and create a controlled ground for painting Correct answer.
  2. To dissolve previous paint layers and bleach the canvas white
  3. To permanently glue wood panels to heavy steel frames
  4. To create a high-gloss final varnish over completed artwork

Explanation

Gesso (traditional chalk/gypsum with animal glue, or modern acrylic gesso) seals porous wood or raw canvas, preventing oil and solvents from rotting organic fibers while providing a bright white, controlled ground for paint adhesion.

Question 30Graphic-plastic expression: materials, image-making and project evidence

Under ASTM D4302 lightfastness standards for artists' pigments, what does a Category I rating signify?

  1. Excellent lightfastness (no noticeable fading for over 100 years in museum lighting) Correct answer.
  2. Fugitive pigment prone to rapid fading within 2 to 10 years
  3. Highly toxic heavy metal requiring toxicological hazard labels
  4. Water-soluble organic dye unstable in oil media

Explanation

ASTM Category I indicates 'Excellent Lightfastness'. Pigments rated ASTM I withstand light exposure for over 100 years under standard museum display conditions without significant chromatic alteration or fading.

Question 31Graphic-plastic expression: materials, image-making and project evidence

When applying powdered graphite across large paper areas, which tool is commonly employed to blend smooth gradations without transferring skin oils?

  1. Paper stump / Tortillon (Difumino) Correct answer.
  2. Metal etching needle
  3. Steel palette knife
  4. Hard rubber brayer

Explanation

A tortillon or paper stump (difumino) is a tightly rolled cylinder of soft paper with tapered ends. It allows artists to smudge and blend graphite powder smoothly across paper while preventing fingers from depositing natural skin oils.

Question 32Graphic-plastic expression: materials, image-making and project evidence

How does compressed charcoal differ chemically and physically from natural vine charcoal?

  1. Compressed charcoal incorporates clay or binder, producing denser, darker marks that are harder to erase Correct answer.
  2. Compressed charcoal is made from pure carbonized grapevines without additives
  3. Natural vine charcoal contains synthetic acrylic resins that make it completely waterproof
  4. Natural vine charcoal cannot be smudged or blended with paper stumps

Explanation

Compressed charcoal is manufactured by pulverizing carbonized charcoal into a fine powder and mixing it with a binder (gum or clay) before pressing into sticks. This binder creates deep, intense black lines that adhere strongly to paper, making erasure significantly more difficult than raw vine charcoal.

Question 33Graphic-plastic expression: materials, image-making and project evidence

Historically, genuine sepia ink was harvested from which natural source?

  1. Ink sacs of cuttlefish (Sepia officinalis) Correct answer.
  2. Crushed oak gall nut excrescences
  3. Charred ivory bone fragments
  4. Fermented walnut hull husks

Explanation

Historically, true sepia ink was derived from the dark brown pigment ink sacs of cuttlefish (Sepia officinalis). In modern art supplies, sepia is typically reproduced synthetically using lightfast brown iron oxides and carbon black pigments.

Question 34Graphic-plastic expression: materials, image-making and project evidence

What structural difference distinguishes soft pastels (pasteles suaves) from oil pastels (pasteles al óleo)?

  1. Soft pastels use gum/tragacanth binders creating dusty matte strokes, whereas oil pastels use mineral wax/oil binders creating buttery stroke layers Correct answer.
  2. Soft pastels contain synthetic acrylic polymer emulsions that dry completely waterproof
  3. Oil pastels can be thinned with pure water, whereas soft pastels require turpentine solvents
  4. Soft pastels can only be applied to non-porous glass plates

Explanation

Soft pastels consist of pure pigment bound with minimal aqueous gum binder (such as gum tragacanth), creating powdery, matte, smudgeable strokes. Oil pastels use a non-drying mineral oil and wax binder, yielding creamy strokes that do not crumble and can be dissolved with solvents like turpentine.

Question 35Graphic-plastic expression: materials, image-making and project evidence

What is paper 'sizing' (encolado) and why is it essential for watercolor paper?

  1. A treatment with gelatin or starch that regulates water absorption, preventing ink from feathering or sinking deep into fibers Correct answer.
  2. A mechanical process that cuts paper stock into standard ISO A4 dimensions
  3. An acid treatment that dissolves lignin to turn paper bright white
  4. A wax coating applied to paper edges to prevent sheets from sticking together

Explanation

Sizing (encolado) involves treating paper fibers with gelatin, starch, or synthetic agents (like AKD) internally or on the surface. Sizing reduces paper absorbency so water and pigment sit on top of the sheet, allowing brilliant washes and crisp edge control without blotting or feathering.

Question 36Graphic-plastic expression: materials, image-making and project evidence

Which surface property defines Rough (grano grueso) watercolor paper?

  1. Air-dried without heavy mechanical pressing, retaining deep pits and pronounced tooth Correct answer.
  2. Passed repeatedly through heated steel rollers to flatten all surface texture
  3. Coated with smooth gesso to eliminate natural cotton fiber tooth
  4. Reinforced with fiberglass mesh to prevent stretching

Explanation

Rough paper (papel de grano grueso) is allowed to dry naturally without heavy pressure from smooth rollers, preserving the pronounced, pitted texture of the felt blankets. This heavy tooth breaks up dry-brush strokes and creates sparkling highlights in wet washes.

Question 37Graphic-plastic expression: materials, image-making and project evidence

Historical iron gall ink (tinta metaloácida) is notorious in conservation for causing 'ink gall decay'. What causes this paper degradation?

  1. Free sulfuric acid liberated by the chemical reaction eats through cellulose fibers over centuries Correct answer.
  2. Excessive wax binders attract wood-boring insects to historical manuscripts
  3. Evaporation of alcohol dissolves paper gelatin sizing completely
  4. Alkaline sodium salts expand, shattering paper fibers

Explanation

Iron gall ink forms when oak gall tannic acid reacts with ferrous sulfate (iron vitriol). The chemical reaction produces free sulfuric acid (H₂SO₄) and excess iron ions, which cause acid hydrolysis and oxidative breakdown of paper cellulose fibers, eventually burning holes through old manuscripts.

Question 38Graphic-plastic expression: materials, image-making and project evidence

What visual result is achieved by executing a 'wet-on-wet' (húmedo sobre húmedo) watercolor technique?

  1. Feathered, soft-edged color blooms and atmospheric blending across damp paper Correct answer.
  2. Crisp, hard-edged graphic details with sharp brush contours
  3. Thick, physical impasto ridges rising above the paper surface
  4. Opaque matte coverage that totally conceals underlying pencil lines

Explanation

Wet-on-wet involves applying wet paint onto paper that is already dampened with clean water or a previous wet wash. Fluid capillary action causes the pigment to spread organically, producing soft, diffused edges, atmospheric gradients, and color blooms.

Question 39Graphic-plastic expression: materials, image-making and project evidence

In watercolor painting, how is masking fluid (reserva líquida / frisket) utilized?

  1. It is painted onto dry paper to form a temporary waterproof rubber barrier that protects white highlights Correct answer.
  2. It is mixed directly into pigments to double their drying speed
  3. It is sprayed over finished paintings to give them a high-gloss enamel sheen
  4. It dissolves underlying paper fibers to create deep physical embossing

Explanation

Masking fluid (reserva de látex) is a liquid rubber latex composition painted onto specific areas of paper to act as a temporary resist. Once dry, watercolor washes can be painted freely over the area. After the paint dries, the latex film is peeled or rubbed off to reveal pristine white paper highlights underneath.

Question 40Graphic-plastic expression: materials, image-making and project evidence

What causes the phenomenon of 'granulation' (granulación) in certain professional watercolor pigments?

  1. Heavy, coarse inorganic pigment particles settling unevenly into the hollows of textured paper Correct answer.
  2. Chemical curdling caused by mixing water with mineral spirits solvents
  3. Rapid evaporation of synthetic acrylic thickeners
  4. Fungal growth resulting from contaminated gum arabic binder

Explanation

Granulation occurs when dense, heavy inorganic mineral pigments (such as Ultramarine Blue, Cobalt Violet, or Viridian) settle unevenly into the microscopic valleys of paper tooth during drying, creating a mottled, textured visual effect.

Question 41Graphic-plastic expression: materials, image-making and project evidence

Unlike acrylic paints, dry gouache paint films retain which property upon re-exposure to water?

  1. Re-solubility (can be re-wetted and manipulated with a damp brush) Correct answer.
  2. Complete chemical polymerization into indelible plastic
  3. Spontaneous color shift from opaque matte to transparent high-gloss
  4. Permanent adhesion to non-porous polished metal without priming

Explanation

Because gouache uses a water-soluble gum arabic binder (without synthetic polymer cross-linking), dried gouache paint layers can be re-wetted, lifted, or blended with a moist brush at any time. Acrylics, by contrast, undergo irreversible polymerization and become permanently waterproof once dry.

Question 42Graphic-plastic expression: materials, image-making and project evidence

How do acrylic gel mediums (geles acrílicos) assist artists in creating thick impasto textures?

  1. They increase paint volume and viscosity without altering color brilliance or binder flexibility Correct answer.
  2. They act as solvent thinners that turn acrylic paint into transparent ink washes
  3. They cause acrylic paint to instantly dry upon contact with air
  4. They etch metal plates to create deep physical intaglio lines

Explanation

Acrylic gel mediums consist of clear acrylic polymer emulsion formatted to a thick paste consistency. Mixed into acrylic paint, they extend volume, hold peaks and heavy brush marks (impasto), and dry transparent without weakening pigment adhesion or film flexibility.

Question 43Graphic-plastic expression: materials, image-making and project evidence

What additive is introduced into acrylic paint to slow down its rapid water evaporation rate, extending open working time for blending?

  1. Acrylic retarder (Retardador de secado / Glycol additive) Correct answer.
  2. Turpentine solvent
  3. Cobalt liquid drier
  4. Powdered pumice stone

Explanation

Acrylic retarders (typically containing glycol compounds) slow down the evaporation rate of water from acrylic emulsion paint films. Adding small quantities extends working 'open time', enabling wet-on-wet blending and soft shading similar to oil paints.

Question 44Graphic-plastic expression: materials, image-making and project evidence

Comparing linseed oil (aceite de linaza) with poppyseed oil (aceite de adormidera) in oil painting, what trade-off exists?

  1. Linseed oil dries faster and forms a tougher film but tends to yellow over time; poppyseed oil yellow less but dries much slower Correct answer.
  2. Poppyseed oil dries twice as fast as linseed oil and never cracks
  3. Linseed oil is completely water-soluble, whereas poppyseed oil requires acid solvents
  4. Poppyseed oil is an opaque white paint, whereas linseed oil is a black solvent

Explanation

Cold-pressed linseed oil contains high levels of linolenic acid, drying into a tough, durable, flexible film, though it exhibits a tendency to yellow in darkness. Poppyseed oil contains less linolenic acid, yellowing far less (making it ideal for whites and pale blues), but dries significantly slower and forms a softer, more brittle film.

Question 45Graphic-plastic expression: materials, image-making and project evidence

What is a 'glaze' (veladura) in oil and acrylic painting?

  1. A thin, transparent layer of dark or chromatic paint applied over a dry, lighter underpainting to modify its tone and luminosity Correct answer.
  2. A thick, opaque paste of white paint slapped onto wet canvas with a palette knife
  3. A protective coat of waterproof varnish applied to raw wood before painting begins
  4. A solvent wash used to scrub off ruined dry paint layers

Explanation

A glaze (veladura) is a transparent, lean or oily paint layer laid over a completely dry underpainting. Light passes through the transparent glaze, bounces off the dry underlayer, and returns to the viewer's eye, producing rich, luminous optical color depth.

Question 46Graphic-plastic expression: materials, image-making and project evidence

Which visual and physical effect is produced by using an 'impasto' (empaste) painting technique?

  1. Thick, raised, textured paint application where brush marks and knife ridges remain visually prominent Correct answer.
  2. Extremely thin, glass-smooth washes of transparent color without visible brushstrokes
  3. Delicate, powdery pastel shading rubbed smooth with paper stumps
  4. Chemically etched hollows carved into copper printing plates

Explanation

Impasto (empaste) involves applying heavy, undiluted paint with brushes or palette knives. The thick paint stands out in relief from the canvas plane, catching ambient light and adding physical texture and expressive vitality to the artwork.

Question 47Graphic-plastic expression: materials, image-making and project evidence

How does traditional woodcut (xilografía al hilo) differ from wood engraving (xilografía a testa) in matrix orientation?

  1. Woodcut uses planks cut parallel to the grain; wood engraving uses dense end-grain wood blocks cut perpendicular to the grain Correct answer.
  2. Woodcut uses copper metal plates; wood engraving uses synthetic linoleum sheets
  3. Woodcut requires acid etching baths; wood engraving relies on lithographic limestone
  4. Woodcut prints only single impressions, whereas wood engraving allows endless editioning

Explanation

Traditional woodcut (grabado en madera a la fibra o al hilo) utilizes wooden planks cut along the grain (side-grain), requiring gouges to cut along soft fibers. Wood engraving (grabado a testa) utilizes dense end-grain blocks of boxwood cut across the tree trunk, enabling fine burin work in any direction without splitting.

Question 48Graphic-plastic expression: materials, image-making and project evidence

What is the function of a traditional 'baren' in Japanese woodblock printing (Mokuhanga)?

  1. A hand disk packed with bamboo leaves used to rub the back of paper against the inked woodblock Correct answer.
  2. A heavy steel etching needle used to scratch metal plates
  3. A carved wooden gouge used to scoop out non-image relief areas
  4. A chemical acid solution used to etch wood grain patterns

Explanation

A baren is a flat, disk-shaped hand tool wrapped in a tough bamboo sheath. In traditional Japanese woodblock printing (mokuhanga), the printer places paper over the inked woodblock and rubs the back of the paper with the baren to transfer water-based ink cleanly into the paper fibers.

Question 49Graphic-plastic expression: materials, image-making and project evidence

How are soft tonal gradations and wash-like atmospheric gray areas achieved in aquatint printmaking (aguatinta)?

  1. Powdered rosin dust is dusted onto the metal plate and fused with heat, creating a porous acid-resistant dot matrix Correct answer.
  2. Heavy steel rockers are rolled over the plate to create uniform velvet burrs
  3. Greasy tusche crayons are drawn across moist limestone slabs
  4. Photosensitive rubber stencils are exposed under intense ultraviolet light

Explanation

Aquatint (aguatinta) creates tonal areas by dusting a copper or zinc plate with fine rosin powder (resina de colofonia) and melting it with heat. The tiny fused rosin specks act as an acid resist; when immersed in acid, the mordant bites a fine reticulated network around the dots that holds ink to print rich tonal values.

Question 50Graphic-plastic expression: materials, image-making and project evidence

Which tool is pushed manually across a metal plate to carve crisp, diamond-section grooves in line engraving (buril)?

  1. Burin (Buril) Correct answer.
  2. Etching needle (Punta de mechar)
  3. Linoleum gouge
  4. Rubber squeegee

Explanation

Line engraving (grabado al buril) utilizes a hardened steel burin (buril) with a square or lozenge-shaped tip set in a mushroom wooden handle. The engraver pushes the burin forward across the copper plate, plowing clean metal shavings out of V-shaped grooves.