The foundry process is the last stage of preparing the finished bronze sculptures that you see throughout these pages.
David uses what is known as the Lost-wax Casting process, an ancient technique dating back thousands of years, to cast the bronzes. (Watch for a forth-coming article on the blog page explaining and detailing how this is done.)
With larger pieces, the final sculpture is not complete until many separate castings are made of parts of the overall bronze and then welded together. Finally, patina is applied to achieve the artist's desired color and look.