Birch bark tar
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Birch bark tar is a substance that is synthesized by dry distillation of birch tree bark.
Birch bark pitch made in a single pot: The birch bark is heated under airtight conditions, and the final product consists of tar and the ashes of the bark.
Flint object with tar, found on the coast of the Netherlands in 2016 by Willy van Wingerden, dating from Weichselin
Modern way of producing birch bark tar in a single pot: the birch bark is heated under airtight conditions; the final product consists of tar and the ashes of the bark.
Chewing gum
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Chewing gum is a soft, cohesive substance designed to be chewed without being swallowed. Modern chewing gum is composed of gum base, sweeteners, softeners/plasticizers, flavors, colors, and, typically
Birch bark tar
…Birch bark tar also has been used as a disinfectant, in leather dressing, and in medicine. A piece of 5,000-year-old chewing gum made from birch bark tar, and still bearing tooth imprints, was found in Kierikki, Finland. Genetic material left in the gum enabled novel research to…
An unwrapped stick of chewing gum
Sticks of Fruit Stripe chewing gum
Traditional extraction of chicle from chicozapote tree (Achras zapota) in Quintana Roo, Mexico. This way of extracting by making zigzag incisions has been known since the ancient Mayan civilization, who called it sicté.
An image of a Colgan's Taffy Tolu Chewing Gum chromolithograph advertisement, c. 1910