ceramic glazing

8/9/2019 Ceramic Glazing

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GlazingGlazing

101101Intro. 3d artIntro. 3d art


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What is Glaze?What is Glaze? Glaze is a thick liquid applied toGlaze is a thick liquid applied to

bisqueware and fired.bisqueware and fired.

Glaze is composed of:Glaze is composed of: TheThe fluxesfluxes help the glaze to melt in the heat.help the glaze to melt in the heat. TheThe refractoriesrefractories that increase the viscositythat increase the viscosity

and stability of the glaze, allowing it to stick toand stability of the glaze, allowing it to stick to

the ware.the ware.

TheThe glass formerglass former, aka silica, aka silica


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Why do you Glaze?Why do you Glaze?

To add colorTo add color

To waterproofTo waterproof

Give surface decoration andGive surface decoration and

treatmenttreatment Give a smooth surfaceGive a smooth surface


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Types of GlazesTypes of Glazes

Matte or GlossyMatte or Glossy

Opaque or TransparentOpaque or Transparent

Low- Fire (Cones 015 - 1)Low- Fire (Cones 015 - 1)

Mid- Fire (Cone 2 - 7)Mid- Fire (Cone 2 - 7)

High- Fire (Cone 8 -13)High- Fire (Cone 8 -13)


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CommerciallyCommercially

Produced GlazesProduced Glazes OpaqueOpaque

Gloss WhiteGloss White Black NiteBlack Nite

DenimDenim

New Albany BrownNew Albany Brown

Rust RedRust Red Straw TanStraw Tan

TransparentTransparent

Dark CobaltDark Cobalt Copper BrownCopper Brown

Golden YellowGolden Yellow

Luster GreenLuster Green

ClearClear


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How do you applyHow do you applyGlaze?Glaze?

DipDip

, using tongs, using tongs

BrushBrush, using a glaze brush, using a glaze brush

PourPour, using a glaze cup, using a glaze cup


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other Techniques ofother Techniques of

adding coloradding color Underglazes - A colorant applied toUnderglazes - A colorant applied to

bisquewarebisquewarewith a brush that requires awith a brush that requires a

transparent glaze over it.transparent glaze over it. Mason stains - a chemical colorant addedMason stains - a chemical colorant added

to clay or slipto clay or slip beforebefore a bisquefirea bisquefire


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Wax ResistWax Resist - A hot wax is applied before glazing so- A hot wax is applied before glazing so

that glaze can easily be removed fromthat glaze can easily be removed from

areas it will touch kiln shelfareas it will touch kiln shelf

To be used on foot and base before glazing,To be used on foot and base before glazing,but can also produce lovely decorative resultsbut can also produce lovely decorative results

Use only WAX BRUSH to brush wax on, once aUse only WAX BRUSH to brush wax on, once a

wax brush, always a wax brushwax brush, always a wax brush


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Dry footingDry footing

Instead of using a wax resist, theInstead of using a wax resist, the

other option is the use a wet spongeother option is the use a wet sponge

and wipe the bottoms clean. It isand wipe the bottoms clean. It is

easier to do so while the glaze is stilleasier to do so while the glaze is stillwet on your object.wet on your object.


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StepsSteps

1.1. PlanPlan


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box projectbox project

You will choose one glazeYou will choose one glaze

Wax bottom and flangeWax bottom and flange

Stir glazeStir glaze DipDip

Wipe off bottom and flangeWipe off bottom and flange

Wipe off raised areas of texturedWipe off raised areas of texturedsurfacesurface


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mugsmugs

Starting tomorrow, you will transferStarting tomorrow, you will transfer

your designyour design

Use (a minimum of 3 colors)Use (a minimum of 3 colors)

underglazes with a brush as directedunderglazes with a brush as directed

Wax bottomWax bottom

Dip into clear glazeDip into clear glaze


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2.2. Bisque FireBisque Fire

3.3. RinseRinse

4.4. Wax on base and footWax on base and foot5.5. Ask questionsAsk questions

6.6. Wipe wax areas with a wetWipe wax areas with a wetspongesponge


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TipsTips1.1. Stir glaze, slip, underglazeStir glaze, slip, underglaze

thoroughlythoroughly

2.2. Finger TestFinger Test

3.3. Always put lids back on to avoidAlways put lids back on to avoidcontaminationcontamination

4.4. Glaze insides firstGlaze insides first

5.5. Aim for an even coat of glazeAim for an even coat of glaze6.6. Clean up after yourselfClean up after yourself


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ceramic glazing

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