ceramics - semester 2 final
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Created by:
soccerlovr103 on May 24, 2011
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32 terms
Terms | Definitions |
|---|---|
 clay is: | the most universal material on earth |
| clay covers what percentage of the earth's surface? | 95% |
| clay is a mixture of: | alumina, silica sand, and water |
| properties of clay | 1) plasticity 2) memory 3) refractory |
| we use _____ clay | stoneware |
| refractory | RESISTS heat and melting |
| kiln | what we fire our clay in |
| our kiln uses _______ to heat | electricity |
| cones | used as temperature gauges -slump over when kiln has reached certain temperature |
| stages of clay | 1 - wet 2 - greenware 3 - leatherhard 4 - bone dry 5 - fired 6 - glazed |
| ceramics | anything that is clay |
| pottery | useful items: plates, cups, bowls, etc. functional or non-functional |
| shrinkage | as it drys, it shrinks 10-20% |
| vitrification | process of becoming glass-like |
| stoneware | high-fire clay (like porcelain) |
| earthenware | low-fire clay (iron - main component) softer |
| porcelain | highest-firing; most valuable; more difficult to work with -closest to purest formula of clay |
| needle | to cut check thickness of clay trim edges |
| modeling tools | wooden tools smooth out clay trim make patterns sculpting |
| wire cutter | cut clay rope, string, wire |
| rib | plastic, metal, wooden sculpting tool smoothing |
| fettling knife | cut clay make straight edge |
| wire loop | trimming/carving tool footing |
| calipers | measures thickness |
| bat | what you throw your piece on |
| slip | watered down clay used as glue |
| firing | heat clay - boils it |
| leatherhard | starting to dry out; still workable but hard to shape |
| high fire | anything over 1800 degrees |
| bone dry | most moisture has left clay body most fragile state |
| pottery wheel | used to throw pottery |
| wedging | getting air out of clay |
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