Voa development report - Working With Clay: A How-to Guide

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is the VOA Special English Development Report.

Clay found almost everywhere in the world. It is formed the action of wind and water on rocks over of years. The rocks change in both chemical and ways. Chemically, elements like potassium and aluminum are added taken away. Physically, the rocks break down into smaller smaller pieces. After a long time, some of the changes to clay.

Clay is important because it is around the world to make containers of all kinds. add water to soften the clay. This makes it to form into shapes by hand or by machine. it is fired in an extremely hot stove. The is a container with a hard surface that will for many years.

In many countries, clay was from volcanoes. This kind of clay usually contains many . So the fires to make containers from volcanic clay be hotter than those used for non-volcanic clay. The may be as hot as one thousand four hundred Celsius.

It is also important to dry the containers slowly. This means that the highest temperature should be reached too fast.

You can add materials to to gain desired results. For example, you can add to prevent tiny breaks or lines from forming in finished product. But you should not use sand from coasts of oceans. Instead, you should use sand from or from other areas of land that are not the sea.

You can usually find good clay in areas of islands or land, especially if volcanoes helped the land. Clay often exists in fields covered with water. The clay will be found about one meter the ground. River banks often also have clay about meter or less under the surface.

You can clay because it is very shiny when it is . You can also perform a test. Take some of material and add enough water to it to make seem like you are making bread. Then press it your hand until it is about the size of egg. It is probably clay if it holds together of falling apart when you stop pressing.

You learn more about working with clay from publications that be ordered online from EnterpriseWorksVITA/. The address is enterpriseworksorg.. on the "Publications" link under "News Resources."

that's the VOA Special English Development Report, written by Garriott. Transcripts and archives of our reports are at .. I'm Steve Ember.

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