Skip to main content

Home/ Youth Voices/ Group items tagged grace

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
Paul Allison

Grace Church | OUTREACH AT GRACE - 0 views

www.gracechurchnyc.org/outreach.htm

grace outreach church gaming future

shared by Paul Allison on 26 Mar 10 - Cached
  • Paul Allison on 26 Mar 10
     
    This is a great program. It's easy to make a difference there! "Holy Apostles Soup Kitchen 296 Ninth Avenue (@28th Street), New York, NY 10001. Soup Kitchen volunteers work Monday through Friday from 9:45am to 1:15pm They need 40-50 volunteers daily to help "run" the Soup Kitchen. Work just one day or make a regular commitment - it depends on you and your schedule. Volunteers assist in serving on the food line, greeting guests, collecting individual meal tickets, handing out drinks, and clearing and cleaning tables when the guests are finished eating. Contact: Clyde Kuemmerle Tel: 212.924.0167 x237 | Email: clyde@holyapostlesnyc.org hask@holyapostlesnyc.org"
qixun cai

Porcelain - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Porcelain

shared by qixun cai on 13 Jan 10 - Cached
  • Porcelain is a ceramic material made by heating raw materials, generally including clay in the form of kaolin, in a kiln to temperatures between 1,200 °C (2,192 °F) and 1,400 °C (2,552 °F). The toughness, strength, and translucence of porcelain arise mainly from the formation of glass and the mineral mullite within the fired body at these high temperatures. Porcelain derives its present name from old Italian porcellana (cowrie shell) because of its resemblance to the translucent surface of the shell.[1] Porcelain can informally be referred to as "china" in some English-speaking countries, as China was the birth place of porcelain making.[2] Properties associated with porcelain include low permeability and elasticity; considerable strength, hardness, glassiness, brittleness, whiteness, translucence, and resonance; and a high resistance to chemical attack and thermal shock. For the purposes of trade, the Combined Nomenclature of the European Communities defines porcelain as being "completely vitrified, hard, impermeable (even before glazing), white or artificially coloured, translucent (except when of considerable thickness) and resonant." However, the term porcelain lacks a universal definition and has "been applied in a very unsystematic fashion to substances of diverse kinds which have only certain surface-qualities in common" (Burton 1906). Porcelain is used to make table, kitchen, sanitary, and decorative wares; objects of fine art; and tiles. Its high resistance to the passage of electricity makes porcelain an excellent insulator. Dental porcelain is used to make false teeth, caps, crowns and veneers.
  • Porcelain is a ceramic material made by heating raw materials, generally including clay in the form of kaolin, in a kiln to temperatures between 1,200 °C (2,192 °F) and 1,400 °C (2,552 °F). The toughness, strength, and translucence of porcelain arise mainly from the formation of glass and the mineral mullite within the fired body at these high temperatures.
    • qixun cai
      qixun cai on 13 Jan 10
       
      these words show how to make a porcelain
  • Porcelain is used to make table, kitchen, sanitary, and decorative wares; objects of fine art; and tiles. Its high resistance to the passage of electricity makes porcelain an excellent insulator. Dental porcelain is used to make false teeth, caps, crowns and veneers.
    • qixun cai
      qixun cai on 13 Jan 10
       
      how do people use the porcelain
  • ...1 more annotation...
  • The following section provides background information on the methods used to form, decorate, finish, glaze, and fire ceramic wares. Forming. The relatively low plasticity of the material used for making porcelain make shaping the clay difficult. In the case of throwing on a potters wheel it can be seen as pulling clay upwards and outwards into a required shape and potters often speak of pulling when forming a piece on a wheel, but the term is misleading; clay in a plastic condition cannot be pulled without breaking. The process of throwing is in fact one of remarkable complexity. To the casual observer, throwing carried out by an expert potter appears to be a graceful and almost effortless activity, but this masks the fact that a rotating mass of clay possesses energy and momentum in an abundance that will, given the slightest mishandling, rapidly cause the workpiece to become uncontrollable. Glazing. Unlike their lower-fired counterparts, porcelain wares do not need glazing to render them impermeable to liquids and for the most part are glazed for decorative purposes and to make them resistant to dirt and staining. Great detail is given in the glaze article. Many types of glaze, such as the iron-containing glaze used on the celadon wares of Longquan, were designed specifically for their striking effects on porcelain. Decoration. Porcelain wares may be decorated under the glaze using pigments that include cobalt and copper or over the glaze using coloured enamels. Like many earlier wares, modern porcelains are often bisque-fired at around 1000 degrees Celsius, coated with glaze and then sent for a second glaze-firing at a temperature of about 1300 degrees Celsius or greater. Another early method is once-fired where the glaze is applied to the unfired body and the two fired together in a single operation. A porcelain doll from the Czech Republic Firing. In this process, green (unfired) ceramic wares are heated to high temperatures in a kiln to permanently set their shapes. Porcelain is fired at a higher temperature than earthenware so that the body can vitrify and become non-porous.
    • qixun cai
      qixun cai on 13 Jan 10
       
      Forming. Glazing.Decoration. Firing. these four words are the most important to make porcelains
1 - 2 of 2
Showing 20▼ items per page