method for

August 11, 2005

method for
coloring concrete
Patent No. U.S. 6,596,072 B1
Hamburger Color Company, King of Prussia, PA, has received a patent for a pigment-containing granule for use in coloring cement consisting essentially of at least one pigment selected from the group consisting of manganese oxide and iron oxide and an agglomerator comprised of a hydrophilic clay.