CONTURAN® DARO

Product Information

SCHOTT has developed a new coating combining durable anti-reflective and oleophobic characteristics, a breakthrough for any touch application.

Anti-reflective coatings are significantly enhancing the contrast of today’s high resolution displays, but their usage in touch applications suffer from the issue of finger print visibility on the surface of such low-reflective glasses.

The availability of a super tough and super durable anti finger print coating, along with an anti-reflective coating has been requested for a long time and is now being offered by SCHOTT on its well known material CONTURAN®, now available as CONTURAN®DARO.

In addition SCHOTT’s R&D has developed a method to characterize the finger print adhesion on untreated and treated glass sheets. With this test procedure it is possible to get reproducible and quantitative results of the amount of finger print transfer onto defined substrates.

AdvantagesLong-term durability for chemical & mechanical wearRepellent to fingerprints and waterEasy-to-clean with a dry soft clothGreat haptics for a gliding feelSmooth surface minimizes abrasion and frictionWater contact angle > 110°Antireflective coating with luminous reflectance < 1 %

ApplicationsTouch screen displaysRuggedized displaysCommand and control displaysMedical displaysGPS displays (e.g. Automotive)Kiosks / Public displaysGaming displays

Dimensions & Product RangeGlass thickness from 1.1 mm up to 6.0 mmAvailable in sizes up to 990 mm x 1,770 mm (72’’ diagonal)Available on CONTURAN®StandardAvailable on CONTURAN®MagicAvailable on CONTURAN®GreyAvailable on CONTURAN®BOROFLOAT®Can be combined with all necessary processing

as screen printing, tempering, laminating etc.

Surface TestingSurfaces of touchscreens need to stand hundreds of thousands of finger touches. Touching the surface leads to mechanical abrasion and to chemical wear because of salt in the sweat on our fingers. In order to prove the durability of CONTURAN®DARO we perform mechanical abrasive tests (cheesecloth rubs) as well as chemical resistance tests (salt spray):

DurabilityLong-term Durability

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®DARO fulfills this demand and keeps its properties such as reduced visibility of fingerprints, easy-to-clean properties and good haptics even if subjected to harsh mechanical and chemical stress.

Proof of Durability for Touch ApplicationsInherently resistant to salt spray environments; more than 90 daysRub resistance greater than 450,000 rubs per MIL-C-675C

ABREX®test

A combination of mechanical and chemical wear is simulated in the ABREX®test and commonly used in the automotive industry. CONTURAN®DARO slightly surpasses the performance of painted plastic parts in Automotive industry (e. g. for gear selectors) according to DIN EN 60068-2-70 / IEC 68-2-70, tested with artificial sweat. CONTURAN®DARO could be used on the gear selector in your car and the oleophobic coating would stand the lifetime of your car!