Mid term test

Question 1

What are the 3 components of a glaze?

Answer 1

1. ) Silica
2. ) Alumina
3. ) Flux

Question 2

Silica is also called what?

Answer 2

Flint

Question 3

Silica is a what?

Answer 3

Silica is a glass former.

An oxide that can readily form a glass.

Question 4

Alumina is what?

Answer 4

Clay.

Alumina is used as a stabilizer.

Question 5

Flux is used for what when making a glaze?

Answer 5

Melter

Lowers melting point of Silica

Question 6

Alumina(clay in glaze) is usually made of?

Answer 6

Kaolin, EPK, China clay

Question 7

The 4 most common high temperature fluxes are?

Answer 7

1. ) Feldspar (for stoneware)
2. ) F-kona (soda feldspar)
3. ) Cluster, G-200 (potash feldspar)
4. ) Zinc (an opacifier)

Question 8

Three more high fire temperature fluxes are called what?

Answer 8

1. ) Nepheline Syenite (soda feldspar)
2. ) Spodumene
3. ) Calcium Carbonate (for whiting)

Question 9

What four Low Fire fluxes are most commonly used to make a glaze?

Answer 9

1. ) Gerstley borate (Boron)
2. ) Magnesium
3. ) Talc
4. ) Frit (manufactured fluxes)

Question 10

Opacifier do what to a glaze?

Answer 10

Make the glaze opaque

Question 11

Four most commonly used opacifiers in making a glaze are?

Answer 11

1. ) Tin oxide (Low temperature)
2. ) Zircopax
3. ) Opax
4. ) Ultrox

Question 12

Colorant in a glaze called Cobalt?

Answer 12

Blue

Question 13

Colorant in a glaze called Chrome?

Answer 13

Green

Question 14

Colorant in a glaze called Copper?

Answer 14

Green IN OXIDATION

Red IN REDUCTION

Question 15

Colorant in a glaze called Iron Oxide?

Answer 15

Brown
Rust
Black
Yellow