Chemetal Alu series of dark-aged aluminum designs emulate the appearance of weathered or blackened steel. Mill aluminum sheets are dipped in a darkening solution and then brushed by hand grinder. These sheets of thin aluminum are lighter to fabricate than steel, which can make the installation lighter. In addition to Alu, many of Chemetal’s 600 Series are blackened with subtle variations for different visual effects. Available in standard sheet sizes or 4 feet x 8 feet as well as a laminate backer option for easy installation.