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"Elephant
Although Elephant brand black powder was only sold in the United States for a relatively brief period of less than I decade, I still come across it now and then.
Manufactured by the Pernambuco Powder Factory in Brazil, over two million pounds of Elephant Brand Black Powder was imported into the United States between 1992 and 2001 (Knight 2). It is difficult to say what percentage was sold for military and pyrotechnic applications but the primary market was for muzzle loading firearms.
At varying times, Elephant Blackpowder was packaged in plastic bottles and steel cans. The essay, "S/A Pernambuco Powder Factory - The Final Years, 1992 to 2001" goes into a fair amount of detail to explain the history of the brands packaging
By most accounts, it was pretty good black powder but quality varied some what from year to year. According to some souces, 1999 was perhaps the best run.
Personally, I have only had experience with vintage 1997 Elephant Blackpowder but I found it to be perfectly satisfactory but although it did not burn quite as cleanly as Goex.
Though the Pernabuco factory had been in business for over a hundred years previous to the first shipment to the U.S, it seems that they saw little opportunity for sales in North America. According to William Knight's paper on the Pernambuco Powder Factory, it was only after a 1991 explosion at the Goex Plant had resulted in a black powder shortage in the U.S. did the time seem right to enter the American Market. The Pernambuco Powder Factory closed its doors in 2001.
A few years later however, the business was restarted in Brazil at a new location, under new management under the company name of,
Elephant Industria Quimica. The powder made by this plant is sold in the U.S. under the Diamondback brand."