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2. Three-phase firing - Wikipedia

   en.wikipedia.org/wiki/Three-phase_firing

   All colours of Greek black-red vase painting are produced by the different concentrations of iron in the clay, and the different degrees to which that iron is oxidised during firing. Iron has the special feature of forming oxides of various colours, including grey Iron(II) oxide (FeO), red Iron(III) oxide (Fe 2 O 3), and deep black magnetite ...

3. Terracotta - Wikipedia

   en.wikipedia.org/wiki/Terracotta

   Unglazed terracotta is suitable for use below ground to carry pressurized water (an archaic use), for garden pots and irrigation or building decoration in many environments, and for oil containers, oil lamps, or ovens. Most other uses require the material to be glazed, such as tableware, sanitary piping, or building decorations built for ...

4. Conservation and restoration of frescos - Wikipedia

   en.wikipedia.org/wiki/Conservation_and...

   Red ochre – natural minerals containing silica and clay some of which is composed of iron oxide and hematite (anhydrous iron(III)-oxide) Yellow ochre – natural minerals that contain silica and clay, and attributing to its color, goethite (iron oxyhydroxide) Lime white – chalk (calcium carbonate and calcite)

5. Pottery of ancient Greece - Wikipedia

   en.wikipedia.org/wiki/Pottery_of_ancient_Greece

   The few ways that clay pottery can be damaged is by being broken, being abraded or by coming in contact with fire. [13] The process of making a pot and firing it is fairly simple. The first thing a potter needs is clay. Attica's high-iron clay gave its pots an orange color. [14]

6. Underglaze - Wikipedia

   en.wikipedia.org/wiki/Underglaze

   Underglaze transfers are a technique that involves screenprinting or free handing a pattern onto a transfer paper (often rice paper or newspaper) which is then placed, dampened, and burnished onto the surface of a leather-hard piece of clay (similar to how a lick-and-stick tattoo might be applied). [21]

7. Conservation and restoration of ceramic objects - Wikipedia

   en.wikipedia.org/wiki/Conservation_and...

   [contradictory] This type of clay is water-soluble and unstable. Earthenware is clay that has been fired between 1000–1200°C or 1832°–2192°F. The firing makes the clay water insoluble but does not allow the formation of an extensive glassy or vitreous within the body. Although water-insoluble, the porous body of earthenware allows water ...

8. List of inorganic pigments - Wikipedia

   en.wikipedia.org/wiki/List_of_inorganic_pigments

   Clay earth pigments (naturally formed iron oxides) Raw umber (PBr7): a natural clay pigment consisting of iron oxide, manganese oxide and aluminum oxide: Fe 2 O 3 + MnO 2 + n H 2 O + SiO 2 + Al 2 O 3. When calcined (heated) it is referred to as burnt umber and has more intense colors. Raw sienna (PBr7): a naturally occurring yellow-brown ...

9. Slip (ceramics) - Wikipedia

   en.wikipedia.org/wiki/Slip_(ceramics)

   African red slip ware: moulded Mithras slaying the bull, 400 ± 50 AD.. A slip is a clay slurry used to produce pottery and other ceramic wares. [1] Liquified clay, in which there is no fixed ratio of water and clay, is called slip or clay slurry which is used either for joining leather-hard (semi-hardened) clay body (pieces of pottery) together by slipcasting with mould, glazing or decorating ...