New molds for higher-performance optical disc formats such as HD-DVD and Blu-ray have been developed by Axxicon Molds Los Angeles Inc. Its new X-technology is said to increase mold durability and reliability as well as disc quality. The HD DVD format, which holds 18 GB of data, and the Blu-ray format, which can store 27 GB, are said to be harder to produce than current disc formats. Axxicon offers the X-technology on SFX fixed-stamper and STX moving-stamper tools. New mold materials in the mirror blocks and redesigned cooling channels reportedly achieve greater temperature uniformity and consistency, providing a broader operating window. A diamond-like carbon coating on the mirror block is said to give a smoother, more wear-resistant surface than a standard titanium nitride coating. Also, a new polishing process is used on several mold parts to enhance reliability in fast-cycle operation.