Casting

Casting is one of the manufacturing process through which a liquid material is commonly poured into a mold that comprises a hollow cavity of the required form and permitted to solidify. The solidified part is also called as a casting that is expelled or separated out of the mold to finish the process. Casting objects are commonly metals or different cold setting materials which cure after combining more elements together such as epoxy, concrete, plaster and clay. Casting is frequently used to create troublesome shapes that would be otherwise complex or expensive to make by other available ways.

Chemical setting materials and casting

Plaster is also considered as a cast and other chemical setting materials such as concrete or plastic resin are either used as single-use waste molds as noted above or multiple-use piece molds. They may also be used as molds created of small ridged pieces or of flexible materials like rubber. While casting plaster or concrete, the completed product is, unlike marble, unattractive, lacking in transparency and so it is commonly painted to give the look of a metal or stone.

Marbles and powdering

On the other hand, the first layers cast may include colored sand in order to give the looks of stone. Through casting concrete rather than plaster it is simple to make sculptures, fountains or seating for outdoor use. A simulation of high standard marble may be created by some chemically set plastic resins with powdered stone added for color. Powdering is a usual way of making attractive washstands, shower stalls, with the skilled working of multiple colors resulting in simulated staining patterns as is often found in natural marble or travertine.

Popular glass casting

Glass casting is one of the popular processes where glass objects are cast by guiding molten glass into a mould where it solidifies. This strategy has been in use since the Egyptian era. The present day cast glass is shaped by different processes like kiln casting, casting into sand, graphite or metal moulds. It was during the Roman period that moulds comprising two or more interlocking parts were employed to make blank glass dishes. And glass could be added to the mould through frit casting where the mould was filed with chips of glass and then heated to melt the glass or by pouring molten glass into the mould.

Italy is one of the countries that enjoyed majority source of early imperial polychrome cast glass where as monochrome glasses are more predominant elsewhere in the Mediterranean. Forms produced exhibit direct inspiration from the Roman bronze and silver industries in the cases of dishes and ceramic industry.

Questions:

• What is casting?
• Where does casting extensively used?