Not until the Act of 1875 was inspection and analysis of imported foodstuffs compulsory; this Act won the support of the trade industries because of its emphasis on “outside” contamination as well as its important distinction between “adulterated foods,” that is, food presenting itself as “pure” although it indeed had additives, and “manufactured” foods, such as Colman’s Mustard that identified additional ingredients such as turmeric which added to the flavor of the mustard. Under the previous acts, all manufactured foods could be found to be “adulterated.
Reference: http://www.branchcollective.org/?ps_articles=judith-l-fisher-tea-and-food-adulteration-1834-75#_ftn4.end
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