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As with nearly all Chinese blue and white porcelain, this was painted when leather-hard, and probably the spout and rings were added. In pottery, leather-hard is the condition of a clay or clay body when it has been partially dried to a consistency similar to leather of the same thickness as the clay. At this stage, the clay object has ...
Anthropoid Clay Coffin with face lid and crossed arms. An example of a grotesque face lid. Grotesque style coffins have eyes, eyebrows, nose, mouth, ears, and beard that have been applied separately to the leather-hard clay. This can be done with slipping and scoring that joins two separate pieces of clay
Leather-hard refers to a clay body that has been dried partially. At this stage the clay object has approximately 15% moisture content. Clay bodies at this stage are very firm and only slightly pliable. Trimming and handle attachment often occurs at the leather-hard state. Bone-dry refers to clay bodies when they reach a moisture content at or ...
Shapira Scroll, leather strips containing a somewhat different text of the Ten Commandments, belonging to Moses Wilhelm Shapira, a Jerusalem antiquities dealer. Widely discredited following its 1883 release, resulting in Shapira's suicide. [68] [69] Has been reassessed following the 1946 discovery of the Dead Sea Scrolls. [68] [69]
Leather-hard The condition of a clay or clay body when it has been partially dried to the point where all shrinkage has stopped. Loss of Ignition The percentage of mass lost when a material is heated under specified conditions: 1,000 °C is common for ceramic raw materials Lustre
The process of burnishing pottery happens when the clay is in a “leather-hard” state. Leather-hard clay is partially dried clay that is in-between being malleable and being brittle. [2] It is important to wet the piece before burnishing because scratch marks will be present on the surface if the clay is too dry. [2]
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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 ...