Touch screens have opened up a new and comfortable experience to all of our information devices. However, this has also created a new problem: fingerprints. This challenge becomes even more evident, if contrast enhancement measures are applied to the screens. Anti-reflection coatings are a good choice for touch screens for enhanced outdoor readability, especially with today's high resolution displays, but they suffer from the same issue, and even to a more severe degree: Anti-reflection coatings provide a low reflection surface that actually enhances the fingerprint visibility due to a larger contrast between clean and dirty surface areas. SCHOTT has developed a coating combination called DARO, that is now being applied on anti-reflective CONTURAN~R to reduce the effect of the fingerprints: The fingerprints, mainly consisting of oily substances and salt, tend to stick much weaker to the surface resulting in lower visibility. Inn addition the residues can be cleaned away much easier without disturbing traces. In order to use an AR coating in a touch application it must have an oleophobic coating that can stand up to hundreds of thousands of finger touches and rubs. CONTURAN~R DARO keeps its properties such as reduced visibility of fingerprints, easy-to-clean properties and good haptic even if subjected to harsh chemical stress.
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