A method for producing an ultrathin chemically toughened glass article is provided that includes: providing an ultrathin glass sheet with a first surface and a second surface joined by at least one edge, having a thickness between the first and the second surface, chemically toughening the ultrathin glass sheet to produce an ultrathin toughened glass article. The method includes applying an edge pre-treatment to the at least one edge, preferably all edges, of the ultrathin glass sheet prior to the chemical toughening in order to reduce and/or blunt edge defects and to increase resistance to breakage of the ultrathin glass sheet during the chemical toughening.