![]() ![]() Similar to World's Fairs, these Expositions were divided by countries. I first encountered isinglass when I was researching at the Smithsonian Institution in the records for the International Fisheries Expositions. Check out the images below to see the process of turning hake swim bladders into strips of isinglass. The majority of production should be done during winter months, due to the nature of the sounds: heat liquefies and putrefies the organs pretty quickly. Then the thick layer is pressed and folded into books or 'leafs'. The swim bladder is removed and the thicker layer is separated from the thin layer. Fish swim bladders convert to gelatin at room temperature.The sound contains a thin outer layer and a thicker layer which contains most of the collagen. The collagen of the trachea of a mammal generally requires heating to 100 degrees Celsius to transform into gelatin and the ear collagen requires heating to 110 degrees. In 1908, George White of the US Bureau of Fisheries described the process for making gelatin from the collagen contained in swim bladders. The fish swim bladder allows fish to control their buoyancy. Isinglass, a term that probably comes from the Dutch word huisenblas or German hausenblase (meaning sturgeon bladder) is a gelatin product made from fish swim bladders (often known as 'sounds'). The issue of corn syrup is not of particular interest to me, but isinglass is something I have run across in my research and my historian ears always perk up when something I previously thought of only in a historical context enters current conversations. One is an ingredient and the other is a product utilized in alcohol fining/clarification: corn syrup and isinglass. Her biggest issue seems to be with two specific things. In Hari's opinion, alcohol companies should post their ingredients for purposes of exposing possible allergens, health concerns of consumers, and personal dietary restrictions (such as vegan and vegetarianism). Many of the ingredients and flavors, as well as the process of brewing alcohol, is considered proprietary information for companies- they do not have to disclose these to the public under current law. Recently, the "Food Babe" (real name: Vani Hari) has called attention to the fact that alcoholic beverages (beer and wine) do not adhere to the same labeling requirements as other foods in the US. ![]()
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