How resistant are the front foils and membrane keyboards produced by Matthes & Henze to oils, greases and cleaning agents?

In general, they are very hard-wearing.

Since the products are always printed on the back, they are permanently resistant to oils, greases and cleaning agents. This printing technique also protects the labelling and graphics from fading due to mechanical, chemical and weather-related environmental influences.

The front foils and membrane keyboards thus also provide reliable protection outside buildings and on vehicles, as no dirt can disable the sensitive electronics and prevent the labelling from becoming illegible.