Well, I hope they don't mind if I copy some of their information here on the MLF.
Noting that they claim to be an importer but say nothing about actual production of the powder, I read most of their information.
It says (and I quote):
"Diamondback Black Powder is manufactured by Elephant Industria Quimica (EIQ) in Brazil to DCCI’s technical specifications. EIQ has been supplying products for national and global businesses for more than 12 years and is known for tradition and quality in black powder. All products are manufactured to the most strict quality and environmental criteria and technical specifications. Product quality and ballistic tests are confirmed by SGS Group, the world's largest control and inspection company."
This tells me that Elephant must either be back in business or Diamondback has bought powder left over from before Elephant went out of business a few years ago.
In either case, in my opinion, Elephant Powder has long had a reputation for making a fairly weak powder that makes much more bore fouling than any other powder available.
I would like to think that some company who actually knows how to make high quality powder has come into existence but this doesn't seem to be the case.