Coating anti-reflection layer containing silicon dioxide on a borosilicate glass body comprises wett

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It a method is described for preparing a [...]washable anti-reflection layer on a, in which a coating solution 1-6 wt. - % HCl with a composition of, 0.5-7 wt- % SiO 2 (Solids content), 0.5-5 wt- % H-Sol 2 O, 85-98 wt. - % readily volatile water-soluble organic solvent is applied. A for coating (in wt.-percent on an oxide basis) contains Glass suitable 70-75 SiO 2 , 8-11 B 2 O 3 , 5-9 Al 2 O 3 , 7-12 alkali metal oxides, alkaline earth oxides 0-10.