case. This drawback makes the technology unsuitable for applications involving continuous handling, and for such popular uses as car music compilation discs, which typically have unavoidable high light and temperature exposure. Since many disc players present internal temperatures significantly higher than room temperature, LightScribe discs should also not be left in disc players for long periods of time. LightScribe discs may form a visible white powder coating. This is due to crystallization of some of the label-side coating. It is not harmful and can easily be removed with a water-dampened cloth. Wiping the disc with a damp cloth does not harm the inscribed label. At this point, LightScribe support has not explained which conditions lead to this reaction, nor the precautions that can be taken to avoid it. Multiple LightScribes of the same image increases contrast, but the image quality decreases with successive burns. Noticeable contrast variations are seen in solid shades. Other uses A LightScribe optical drive was used by Maher El-Kady, a graduate of UCLA in 2012 to successfully turn a specially prepared graphite oxide layer coated onto a DVD into graphene. El-Kady and Richard Kaner, his lab professor, used an unmodified LightScribe drive. The disc was prepared by coating the disc with an aqueous solution of graphite oxide and allowing it to dry. Areas of the coating illuminated by the LightScribe laser were turned into graphene. Various shapes can be drawn, which allowed the scientist duo essentially to laser-print an ultracapacitor on graphene using consumer-grade technology. Another use is to prepare a PCB layout on an unburned LightScribe CD-R as there is enough contrast to form a weak shadow image on a photosensitive PCB with UV light. The ratio with a single pass is not that good but multiple burns are. See also DiscT@2 LabelFlash, a similar but incompatible technology LabelTag References External links , "Integrated CD/DVD recording and labeling", Daryl E. Anderson, Makarand P Gore, Paul J McClellan, Hewlett-Packard Development Company HP LightScribe Direct Disc Labeling LightScribe Drives Comparison at CdrInfo.com Free Software Download and support website Good resource for the most recent (final) drivers and apps for Mac, Linux and Windows Original page for LightScribe support - made unusable by HP in January 2014 LightScribe.TV The LightScribe Video Training and Support Website Hewlett-Packard products Computer storage media Consumer electronics Computer printers Compact disc DVD