shards
In ceramists' terminology, the shard is the mixture of various minerals and admixtures fired for the manufacture of ceramic products or ceramic masses. The chemical conversion of the green body (also known as the blank) to the broken body can take place in one or more fires and begins at around 650 ° C.
Biscuit firing
The first firing (pre, incandescent, biscuit or biscuit firing ) takes place between 800 and 1000 ° C , depending on the classification of the ceramic concerned. After the biscuit firing, the body can no longer be softened by water or liquid glaze .
Burnout
The glazed body is fired during the second firing ( smooth or glaze firing) at 960 to 1480 ° C, again depending on the ceramic concerned, and receives its final shape and material structure.
Common word for crockery
In the southern German -speaking countries, the word is broken (dialektal Scherbn to Scheam speaking) even for simple crockery, as flower pots made of terracotta used. Also in the southern German- speaking area and in Austrian German it is used, derogatory or out of date, to refer to the chamber pot . From this, colloquially or casually, the phrase open the broken glass is derived . This means that someone is in an embarrassing position, has been harmed, or is in big trouble. called. The word shards was further z. B. in Slovak as šerbeľ - trivialized or reduced as šerblík - adopted.
Individual evidence
- ↑ Entry on Shard and Shards . In: Austrian dictionary . 41st edition. ÖBV, Vienna 2009.