What You Need to Know
Isinglass is a form of collagen obtained from the dried swim bladders of fish. The English word origin is from the obsolete Dutch huizenblaas – huizen is a kind of sturgeon, and blaas is a bladder, or German Hausenblase, meaning essentially the same. The bladders, once removed from the fish, processed, and dried, are formed into various shapes for use.
Steps
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British beer clarification (United Kingdom): Traditional fining agent for cask ales
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Russian vzvar (Russia): Clarifying agent in fruit-based holiday drink
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Portuguese white wine fining (Portugal): Historical use in Vinho Verde production