Quark (dairy product) 6.1). Acidification allowed to continues until the pH reaches around 4.6, at which acidity level the casein proteins in the milk begins to precipitate. In Germany, the curd is continuously stirred to prevent it from getting hard, resulting in a thick, creamy texture. According to German regulations on cheese ("Käseverordnung"), "fresh cheeses" ("Frischkäse") such as quark or cottage cheese must contain at least 73% water in the fat-free component. German quark is usually sold in plastic tubs with most or all of the whey. This type of quark has the firmness of sour cream but is slightly drier, resulting in
Quark (company) program, mTropolis, before discontinuing it in the late 1990s. Quark acquired two companies creating add-ons for QuarkXPress and InDesign, in 2005 alap and in 2010 Gluon. In March 2008, Quark announced a new direction. Quark acquired an XML editor vendor in 2008, a company called in.vision research. On May 29, 2012 Quark acquired Mobile IQ, with digital publishing technology for tablet devices named PressRun, later renamed to App Studio. Reflecting a shift towards Web-based word-processing tools such as Office 365 and Google Docs, in November 2014, Quark announced the release of a new authoring tool, Quark Author. In November 2017,