Isinglass advantageous in situations where minimal use of water is desired for the parchment as the isinglass can be reactivated with an ethanol-water mixture. It also has a greater adhesive strength than many other adhesives used for parchment repair. Isinglass Isinglass () is a substance obtained from the dried swim bladders of fish. It is a form of collagen used mainly for the clarification or fining of some beer and wine. It can also be cooked into a paste for specialised gluing purposes. Its origin is from the obsolete Dutch "huizenblaas" – "huizen" is a kind of sturgeon, and "blaas" is
Trub (brewing) fermentation. It is composed mainly of heavy fats, coagulated proteins, and (when in fermenter) inactive yeast. The term has its origins in the German word "trübe" (also "trüb"), which means "cloudy", via the brewing and winemaking terms "Trubstoff" ("cloudy" + "material") and "Weintrub" ("wine" + "cloudy"). Trub (brewing) In the process of brewing beer, trub is the term used for the material, along with hop debris, left in the whirlpool or hopback after the wort has been boiled then transferred and cooled. Brewers generally prefer that the bulk of the trub be left in the whirlpool rather than stay in