Imperial Sizing Die Wax was developed in the early 1970's, and it has been popular with precision reloaders ever since - look in any shooters reloading box at a benchrest match and you will find a tin. Reloaders like Imperial because of its extremely high lubricity and ease of removal. Full length sizing and forming the toughest wildcats is made easier with Imperial Wax. Cases are easily wiped clean with a paper towel.
Big Book Catalog, Issue:66, Page:517
Sinclair, Issue:3B, Page:078