Why are some Projected Capacitive touch screens more prone to scratches?

We often receive feedback from customers: why do touch screens with the same nominal hardness have significantly different scratch resistance performance in actual use? Today, let's talk about the key factors that affect the hardness of Projected Capacitive touch screens.
 

Firstly, it should be understood that the hardness of a Projected Capacitive touch screen is not only determined by the material itself, but also closely related to the manufacturing process. Although ordinary tempering treatment can improve the basic hardness, without sufficient ion exchange process, the compressive stress layer on the surface is not dense enough. The multi-stage ion exchange process used in our factory can improve the hardness uniformity of the glass surface by more than 30%.
 

Another often overlooked factor is environmental adaptability. In high temperature and high humidity environments, the surface hardness of ordinary Projected Capacitive touch screens. will significantly decrease. For this purpose, we have developed special environmental stabilization techniques to ensure that the product can maintain stable hardness performance even under extreme conditions. The touch screen customized for a certain offshore operation equipment last year had its hardness decay controlled within 5% in salt spray testing, far exceeding industry standards.
 

For devices that frequently require touch operation, we also recommend paying attention to the indicator of dynamic hardness. Ordinary testing can only reflect static hardness, while in actual use, repeated friction will accelerate surface wear. Our solution is to add a nano level protective layer on the surface, allowing the screen to maintain excellent touch experience even after long-term use.