RHEINZINK® Titanium Zinc is manufactured to the highest standards with a 99.005% degree of purity as defined by DIN EN 1179. Its purity allows it to be recycled indefinitely without the loss of any of its chemical or physical properties and can be re-used in further applications. The raw material is melted, cast and wound onto a steel sleeve in a single continuous operation. The quality of this material is uniform and flawless. The classic line of RHEINZINK® is available in three natural finishes: bright-rolled, blue-grey and graphite-grey. Bright-rolled finish develops a classic blue-grey appearance due to the formation of the patina. It protects the metal from corrosion. RHEINZINK® prePATINA blue-grey and RHEINZINK® prePATINA graphite-grey are given the elegant appearance of a factory finished zinc patina. The blue-grey and graphite-grey colouring of these two pre-weathered formats are alloy-based and are neither colour coated, nor phosphated.