CLAY RECYCLING:
Dry the scrap clay on the bisque kiln or in kiln room (this loosens clay particle bonds--critical step). Slake (wet) it by pouring water over scraps in 5 gallon bucket. Let it sit for awhile, then poke with stick to mix and debubble it. Pour off excess water into another bucket. Leave in kiln room till dry enough to spread on boards. Wedge when workable, store when proper consistency.
Friday, January 23, 2009
PRETTY COFFEE STAINS
Take a look at these cool pieces by Bethan Laura Wood that evolve with use.
About these pieces:
I have a soft spot for coffee stained mugs. I don’t have any cups that have stains as fancy as these, but my favorite pieces definitely are marked from years of use.
People tend to have very strong opinions on the interior glazing of mugs. I have customers who come in wanting dark glazed interiors so there is no chance of staining. And others who want a light interior so they can see how steeped their tea is. I make some of each depending on the design of the piece. My personal preference is a lighter glaze so I can see how much milk I’ve added to my morning coffee. What’s your cup of tea?
About these pieces:
"Stain is a set of a teacups designed to improve through use. This project examines the assumption that use is damaging to a product (For example, scratches on an iPod).
The interior surface of the cup is treated so as to stain more in predetermined places. The more the cups are used, the more the pattern is revealed. Over time they will build up an individual pattern dependent on the users personal way of drinking tea."
I have a soft spot for coffee stained mugs. I don’t have any cups that have stains as fancy as these, but my favorite pieces definitely are marked from years of use.
People tend to have very strong opinions on the interior glazing of mugs. I have customers who come in wanting dark glazed interiors so there is no chance of staining. And others who want a light interior so they can see how steeped their tea is. I make some of each depending on the design of the piece. My personal preference is a lighter glaze so I can see how much milk I’ve added to my morning coffee. What’s your cup of tea?
TERMS
BALL CLAY
A secondary clay moved from the parent rock, ball clay is often mixed with other clays and minerals, organic matter are frequently present. Ball clays commonly exhibit high plasticity and high dry strength.
BAT
Less commonly also known as a "batterboard", thin slab of wood, plaster, or plastic used to support pottery forms during throwing, attached to the head of the potter's wheel by clay body or "bat pins".
BLOATING
The permanent swelling of a ceramic article during firing caused by the evolution of gases.
BONE CHINA
Vitreous, translucent pottery made from a body of the following approximate composition: 45-50% calcined bone, 20-25% kaolin. 25-30% china stone.
CLAY
A group of hydrous aluminium phyllosilicate minerals. Often also used to refer to the clay body, which sometimes may only contain small amounts of clay minerals.
CROCKERY
synonym of pottery.
DUNT
A crack caused by thermal shock, especially if ware cooled too rapidly after it has been fired.
ENAMEL
Coloured, glass-like decoration applied to ceramic wares. Also called on-glaze decoration. Often made by mixing metal oxides with a lead-based flux. Enamels are usually fired to temperatures in the range of about 700 to 800 degrees Celsius.
FETTLING
The removal, in the unfired state of excess body left in the shaping of pottery-ware at such places as seams and edges.
GLAZE
A coating that has been matured to the glassy state on a formed ceramic article, or the material or mixture from which the coating is made.
JOLLY
To shape hollowware by the same process as jigger.
LEATHER-HARD
The condition of a clay or clay body when it has been partially dried to the point where all shrinkage has been completed.
PINHOLES
Faults in the surface of a ceramic body or glaze which resemble pin pricks.
PORCELAIN
A vitreous ceramic material. Traditionally considered to be white and if, of thin section, translucent.
POTTER
A person who makes pots or other ceramic art and wares.
WEDGING
A procedure for preparing clay or a clay body by hand: the lump of clay is repeatedly thrown down on a work bench; between each operation the lump is turned and sometimes cut through and rejoined in a different orientation. The object is to disperse the water more uniformly, to remove lamination and to remove air.
A secondary clay moved from the parent rock, ball clay is often mixed with other clays and minerals, organic matter are frequently present. Ball clays commonly exhibit high plasticity and high dry strength.
BAT
Less commonly also known as a "batterboard", thin slab of wood, plaster, or plastic used to support pottery forms during throwing, attached to the head of the potter's wheel by clay body or "bat pins".
BLOATING
The permanent swelling of a ceramic article during firing caused by the evolution of gases.
BONE CHINA
Vitreous, translucent pottery made from a body of the following approximate composition: 45-50% calcined bone, 20-25% kaolin. 25-30% china stone.
CLAY
A group of hydrous aluminium phyllosilicate minerals. Often also used to refer to the clay body, which sometimes may only contain small amounts of clay minerals.
CROCKERY
synonym of pottery.
DUNT
A crack caused by thermal shock, especially if ware cooled too rapidly after it has been fired.
ENAMEL
Coloured, glass-like decoration applied to ceramic wares. Also called on-glaze decoration. Often made by mixing metal oxides with a lead-based flux. Enamels are usually fired to temperatures in the range of about 700 to 800 degrees Celsius.
FETTLING
The removal, in the unfired state of excess body left in the shaping of pottery-ware at such places as seams and edges.
GLAZE
A coating that has been matured to the glassy state on a formed ceramic article, or the material or mixture from which the coating is made.
JOLLY
To shape hollowware by the same process as jigger.
LEATHER-HARD
The condition of a clay or clay body when it has been partially dried to the point where all shrinkage has been completed.
PINHOLES
Faults in the surface of a ceramic body or glaze which resemble pin pricks.
PORCELAIN
A vitreous ceramic material. Traditionally considered to be white and if, of thin section, translucent.
POTTER
A person who makes pots or other ceramic art and wares.
WEDGING
A procedure for preparing clay or a clay body by hand: the lump of clay is repeatedly thrown down on a work bench; between each operation the lump is turned and sometimes cut through and rejoined in a different orientation. The object is to disperse the water more uniformly, to remove lamination and to remove air.
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