Leather-hard
Encyclopedia
Leather-hard is the condition of a clay
or clay body when it has been partially dried to the point where all shrinkage
has been completed. At this stage the clay object has approximately 15% moisture content. The clay is still visibly damp (usually a darkish gray) but has dried enough to be able to be handled without deformation. The clay is able to be gouged or incised without breaking, but will not receive impressions.
Clay
Clay is a general term including many combinations of one or more clay minerals with traces of metal oxides and organic matter. Geologic clay deposits are mostly composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure.- Formation :Clay minerals...
or clay body when it has been partially dried to the point where all shrinkage
Shrinkage
Shrinkage has multiple meanings, depending on the context.* Shrinkage – the loss of products* Shrinkage – a technique to improve an estimator* Shrinkage – a common problem when doing laundry...
has been completed. At this stage the clay object has approximately 15% moisture content. The clay is still visibly damp (usually a darkish gray) but has dried enough to be able to be handled without deformation. The clay is able to be gouged or incised without breaking, but will not receive impressions.