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As part of a more than fifty-year-old Chicago tradition, the Chicago River is dyed green in observance of St. Patrick's Day. [79] The actual event occurs on the Saturday on or before March 17. The tradition of dyeing the river green arose by accident in 1961 when plumbers used fluorescein dye to trace sources of illegal pollution discharges. [80]
In 1962, the city also began its famous Chicago St. Patrick's Day tradition of dyeing of the Chicago River green, with thousands of people lining the streets along the river to watch as a boat releases dye into the river. The Chicago Journeymen Plumbers Union Local 130 has historically sponsored the river dyeing and knows the secret to the dye ...
One of its more recognizable uses was in the Chicago River, where fluorescein was the first substance used to dye the river green on St. Patrick's Day in 1962. In 1966, environmentalists forced a change to a vegetable-based dye to protect local wildlife. [27]
One of the most iconic St. Patrick’s Day celebrations in the U.S. is Chicago temporarily dyeing the river that shares its name green using about 40 pounds of environmentally friendly dye.
"Although we didn’t gather, we were able to honor long-standing tradition by dyeing the Chicago River green," Mayor Lori Lightfoot tweeted Saturday. Chicago River dyed green for St. Patrick's ...
CHICAGO - The Chicago River turning green kicked off Chicago's St. Patrick's day festivities this morning. Thousands looked on and then stuck around for the annual downtown parade that made its ...
The Chicago River is dyed green every year to mark St. Patrick's Day. Many minerals provide pigments which have been used in green paints and dyes over the centuries. Pigments, in this case, are minerals which reflect the color green, rather that emitting it through luminescent or phosphorescent qualities. The large number of green pigments ...
In an annual tradition dating back to the 1960's, the Chicago River was dyed a bright green on Saturday to kick off St. Patrick's Day celebrations across the city. Rough Cut (no reporter narration).