I'm not sure if Kauffman is right. I have Lafontaine's "Challange of the trout" written in 1976(?) and he talks about finding antron, "sparkle yarn", and scuba diving in the river w/ Bill Seeples and experimenting w/ the material.It was first published in an article in the 1974 newsletter from the Conn. flyfishers Assoc. So he was using it 30 yrs ago.
Mercer's name is a fairly recent name (at least to me) in the flyfishing arena.