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    Comp 767: Advanced Topics in GraphicsComp 767: Advanced Topics in Graphics

    Introduction to WatercolorIntroduction to Watercolor

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    Properties of WatercolorProperties of Watercolor

    Watercolor materialsWatercolor materials

    Watercolor paperWatercolor paper

    PigmentPigment

    Watercolor effectsWatercolor effects

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    Watercolor PaperWatercolor Paper

    Typically not made of wood pulpTypically not made of wood pulp

    But from linen or cotton ragspounded into small fibers

    Extremely absorbent to liquids

    Slows down the rate ofSlows down the rate of waterabsorption and diffusion

    Source: misterart.com

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    PigmentPigment

    Source: misterart.com

    A pigment is a solid material inthe form of small, separate

    particles (ranging from 0.05 to0.5 microns)

    Pigments vary in density

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    Properties of watercolorProperties of watercolor

    Watercolor effectsWatercolor effects

    DryDry--brush effectsbrush effects

    Edge darkeningEdge darkening Intentional backrunsIntentional backruns

    Granulation and SeparationGranulation and Separation

    Flow PatternsFlow Patterns

    GlazingGlazing

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    DryDry--brush Effectsbrush Effects

    TechniquesTechniques

    Dry brush that isDry brush that isalmost driedalmost dried

    Applied at a properApplied at a properangleangle

    EffectsEffects

    Irregular gapsIrregular gaps

    Ragged edgesRagged edges

    Source: Computer Generated Watercolor

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    Edge DarkeningEdge Darkening

    TechniquesTechniques

    WetWet--onon--dry brushstrokedry brushstroke

    EffectEffect

    Darken edgesDarken edges

    Source: Computer Generated Watercolor

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    Intentional BackrunsIntentional Backruns

    Occurs whenOccurs whenA puddle of water spreadA puddle of water spread

    back into a damp region ofback into a damp region ofpaintpaint

    A wash brush dries unevenlyA wash brush dries unevenly

    The water tends to pushpigment along as it spreads

    EffectEffect Complex branching shapesComplex branching shapes

    Severely darkened edgesSeverely darkened edgesSource:

    Computer Generated Watercolor

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    Granulation and Separation ofPigmentsGranulation and Separation ofPigments

    Granulation of pigmentsGranulation of pigments

    Yields a kind of grainy texturesYields a kind of grainy textures

    Varies from pigment to pigmentVaries from pigment to pigment

    Strongest when paper is veryStrongest when paper is verywetwet

    Separation of pigmentSeparation of pigment

    Refers to splitting of colorsRefers to splitting of colors

    Occurs when denser pigmentsOccurs when denser pigmentssettle earlier than lighter onessettle earlier than lighter ones

    Source:

    Computer Generated Watercolor

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    Flow PatternsFlow Patterns

    In wetIn wet--inin--wet paintingwet painting

    wet surface allows thebrushstrokes to spread freely

    EffectsEffects

    Soft, feathery shapes

    Source:

    Computer Generated Watercolor

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    GlazingGlazing

    Techniques

    Adding very thin, pale layers,or washes, of watercolor, one

    over another Different pigments are not

    mixed physically, but optically

    EffectsEffects luminous

    glowing from within

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    SummarySummary -- WatercolorWatercolor

    Summary of Watercolor effects

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    Lesson ObjectivesLesson Objectives

    Students willStudents willexplore watercolorexplore watercolorin order toin order tounderstand itsunderstand itsproperties.properties.

    Students willStudents willdemonstrate andemonstrate anunderstanding ofunderstanding ofwatercolorwatercolortechniques in ordertechniques in ordercreate valuecreate value

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    Using watercolor in different ways, helps create variety in aUsing watercolor in different ways, helps create variety in a

    work of art. Lets look at different brush strokes.work of art. Lets look at different brush strokes.

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    Lesson 1: Creating different brush strokesLesson 1: Creating different brush strokes

    This exercise willThis exercise willhelp you learn how tohelp you learn how touse your paint brushuse your paint brushin order to createin order to createdifferent brushdifferent brushstrokes.strokes.

    These techniques thatThese techniques thatyou learn will reallyyou learn will reallyhelp you behelp you besuccessful in yoursuccessful in yourfinal composition.final composition.

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    Create different brush strokes depending on how muchCreate different brush strokes depending on how much

    water is on your brush.water is on your brush.

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    By using a dry brush you can create brushBy using a dry brush you can create brush

    strokes like thisstrokes like this

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    You can create smooth brush strokes by using more water.You can create smooth brush strokes by using more water.

    Also, notice how by using more paint on one side of yourAlso, notice how by using more paint on one side of your

    brush will creates different values.brush will creates different values.

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    Even brush strokes are created by an equal amount of paintEven brush strokes are created by an equal amount of paint

    and water, and also a smooth stroke.and water, and also a smooth stroke.

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    Do this nowDo this now

    Create a single page painting in yourCreate a single page painting in yoursketchbook using different amounts ofsketchbook using different amounts ofwater.water.

    Divide your page into three areas andDivide your page into three areas andcreate these three types of brushcreate these three types of brushstrokes.strokes.

    This should take you 15This should take you 15--20 minutes.20 minutes.

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    Lesson 2: Background WashLesson 2: Background Wash

    Using more waterUsing more waterand less pigmentand less pigment

    DemoDemo

    Draw 3 boxes ofDraw 3 boxes of

    15cm x 20 cm15cm x 20 cm Paint 3 backgroundPaint 3 background

    washes with 3washes with 3differecnt colours.differecnt colours.

    This should take youThis should take you

    30 min.30 min.

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    Lesson 3: TextureLesson 3: Texture

    Using different brushUsing different brushstrokes instrokes incollaboration withcollaboration withone another canone another cancreate the idea ofcreate the idea of

    different texture.different texture.

    DemoDemo

    Divide your paperDivide your paperinto thirds and createinto thirds and create

    three differentthree differenttextures.textures.

    This should take youThis should take you20 minutes.20 minutes.

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    ExampleExample

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    Lesson 4: Values ScaleLesson 4: Values Scale

    You will create threeYou will create three

    value scales in yourvalue scales in your

    sketchbook by using asketchbook by using a

    different brush strokes.different brush strokes.

    DemoDemo

    Tip:Tip: Different amountsDifferent amounts

    of water, along withof water, along with

    different types of brushdifferent types of brushstrokes creates variety.strokes creates variety.