Ricotta production has been documented in Italy back to the Bronze age. The name
ricotta ("boiled again") refers to the use of whey that remains after the production of cheese; the whey is acidified and boiled again and the proteins still contained in the whey (lactoglobulins; casein is no longer there) coagulate and precipitate as curds. The French term
sérac or
séré is mentioned among other cheeses in a Gruyère document dating from 1312. In
Valais, it is mentioned in a document from 1437. This appellation, however, might have been associated with another type of fresh cheese which was not a by-product, but a domestically made cheese. The
Schabziger, from
Glarus, is an example of such fresh cheese. Ziger, as a peasant staple food produced from whey, appears in literature from the Renaissance. Several writings from the 18th and 19th centuries also show that, at that time, Ziger was close to what we know today. From the 20th century, the consumption of Ziger declined owing to an increase in purchasing power. Today, its production is very small compared to other Swiss cheeses. == Production ==