Fill in the Blanks Ceramic ProcessesOnline version Use your new knowledge to fill in the blanks by kayn Lewis 1 chamois wheel extruder sponge wire Casting batt thickness Cottle slip Mould Coiling scratch scales turning Throwing undercuts Pinching fettling Slab slip wedging Lumps of clay are measured on the when specific / equal amounts of clay are needed , ( creating multiples of the same size item ) and is done to improve clay consistency / remove air bubbles A ball of clay is centred on the pottery . Ceramicists use their hands , throwing tools , ribs and rubber kidneys , to bring shape to the form and smooth the surface . This is called . A is used to add or remove water and smooth the surface . It is important to compress the rim of the form this can be done with fingers , or a piece of leather . A is used to cut the clay at the base of the form , after wiring off , pieces made on a separate can be left on it to become dry enough for Work can be placed back on the wheel and turning tools including loop tools and stem tools can be used to removes excess weight , refine the shape , and add foot rings by turning clay from the base . There are different examples of Hand building . When Clay is squeezed between fingertips to create the required shape , it is called . When clay is rolled out and cut to the required shape , and stiffened pieces are joined using scratch and slip method to create the form it is called Building . When Coils are made by hand ( rolling ) or machine ( ) and used to create the form , it is called . Most of the time the surface is smoothed out by hand but sometimes coils are left visible . When making a out of plaster . the item to be cast is prepared , using clay to avoid , and usually in a temporary frame of Boards the plaster is poured on , producing a reverse of the item . Oil or soft soap is used on the item being cast and on the plaster if more plaster parts are to be poured ( more than a one piece mould ) , to allow separation and release after the mould is made . A Cottle can also be a cylindrical tube sealed with clay around the base and held around the height with string or duct tape to avoid leaks . Pouring ( liquid clay ) into a plaster mould to recreate the internal form is called Slip - The clay forms a skin as it dries against the plaster and the excess slip is poured out when the of the skin is enough . The clay is then dried in the mould , until it is safe to take out ( typically an hour ) at this stage they can be joined on to other pieces using the and method . The surface is refined and the seams from slip cast forms are removed , in a process called . Clay at this stage is called greenware and is still able to be recycled .
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