art 260 01 ceramics 1

UNDERSTANDING CONES

Glaze of Our Lives Part Three

Why do we fire pottery/glazes? *

o because it’s fun

o to induce a chemical reaction

What temperature is cone 10? *

What temperature is cone 6? (This is what we glaze fire to.) *

What temperature is cone 04? (This is what we bisque fire to.) *

What greek symbol do we use to represent “cone” when writing? *

o Epsilon

o Delta

o Beta

o Omega

What year were cones invented and who invented them? *

How did we historically measure the temperature of a kiln? Please describe in as much detail as you can. *

What is the BEST tool to use to measure the temperature of a kiln? *

o K type pyrometer

o R type pyrometer

o optical pyrometer

As Seger used different proportions of glass formers and fluxes to create pyrometric cones, what cone was reached at almost no glass former and all flux? *

In 1892, who developed a tweak that allowed for temperatures below cone 1? *

What is the highest cone we can measure? *

o cone 75

o cone 15

o cone 42

o cone 042

What is the lowest cone we can measure? *

o cone 022

o cone 22

o cone 04

o cone 075

What is wadding? *

As best as you can, please describe how pyrometers work. *

How many cones are needed to get an accurate reading of how a firing went? *

o 5

o 4

o 3

o 2

o 1

What position on a clock should a pyrometric cone be at for a firing to have been “well fired”? *

Cones teach us that time (can) equal temperature. *

o True

o False

A faster firing needs a _____ temperature *

o higher

o lower

A slower firing needs a _____ peak temperature. *

o higher

o lower

Why do explosions happen in a kiln? *

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