Glazing Ceramics

Glazes are a type of

• Glass
• Clay
• Paint
• Carving

Percent of the Earth’s crust that is composed of silica

• 40%
• 50%
• 10%
• 60%

Three basic ingredients of glazes:

• Clay, water, flux
• Grog, silica, iron
• Flux, glass former, refractory
• Refractory, water, clay

About the temperature that is required to melt pure silica:

• 1500 degrees
• 1200 degrees
• 4000 degrees
• 3100 degrees

Low-fire glazes don’t have a strong ____________ because they don’t melt enough:

• Interface
• Carbonates
• Oxide
• Color

Materials usually added to glazes for coloring:

• A. Metallic oxides
• B. Carbonates
• C. oxygen
• A and B

Chroma and hue are affected by:

• Brilliance and intensity
• Stains and engobes
• Temperature and atmosphere of the fire
• Oxygen and oxides

Two decorative materials used with glazes:

• Stains and engobes
• Glazes and paint brushes 
• Salt and Sgraffito
• Wood ash and saw dust

Four common methods of glazing:

• A. Dipping, spraying
• B. Smoothing, flattening
• C. Pouring, brushing
• A and C

Glazing defects come from:

• Compounding the glaze
• Improper firing
• Poor application
• All of the above