Name (also fish glue) for the protein-containing agent obtained from fish bladders (house, sturgeon, catfish). Originally, only the bladder of Hausen (beluga) was used, which is native to the rivers that flow into the Caspian and Black Sea. Today, however, bladders of other fish species are also used, the most suitable ones being beluga and sturgeon. After the catch, the bubbles are cut open, softened in hot water and...
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