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2. Urine-indicator dye - Wikipedia

   en.wikipedia.org/wiki/Urine-indicator_dye

   Rumours of the origin of urine indicator-dye go back at least as far as 1958, [1] and the story is commonly told to children by parents who do not want them to urinate in the pool. [3] A 1985 biography of Orson Welles describes him using such a dye as part of a prank in 1937.

3. Fluorescein - Wikipedia

   en.wikipedia.org/wiki/Fluorescein

   In 1966, environmentalists forced a change to a vegetable-based dye to protect local wildlife. [28] Fluorescein dye solutions, typically 15% active, are commonly used as an aid to leak detection during hydrostatic testing of subsea oil and gas pipelines and other subsea infrastructure. Leaks can be detected by divers or ROVs carrying an ...

4. Methylene blue - Wikipedia

   en.wikipedia.org/wiki/Methylene_blue

   Methylene blue is also used as a dye in chromoendoscopy, and is sprayed onto the mucosa of the gastrointestinal tract in order to identify dysplasia, or pre-cancerous lesions. Intravenously injected methylene blue is readily released into the urine and thus can be used to test the urinary tract for leaks or fistulas. [citation needed]

5. Edmond's only city-owned pool is leaking thousands of gallons ...

   www.aol.com/edmonds-only-city-owned-pool...

   Replace its concrete decks, gutters and the pool shell at a cost of roughly $5 million, leaving its existing slide towers, cabanas and the pool's mechanical systems in place.

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Dye penetrant inspection - Wikipedia

   en.wikipedia.org/wiki/Dye_penetrant_inspection

   Dye penetrant inspection (DP), also called liquid penetrate inspection (LPI) or penetrant testing (PT), is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials (metals, plastics, or ceramics).