NOVELTY - Prestressed safety glass with a wipe-proof and porous silica antireflection layer is produced by coating suitable glass with a colloidal-disperse solution, which is obtained by hydrolytic condensation of (organo)silane(s) and/or precondensate(s) and also contains organic polymer with hydroxy (OH) and/or imino (NH) group(s) and a molecular weight of 200-500000, with 0.1-100 mmole polymer/mole silane. The glass is dried, heated and chilled.    USE - The coated safety glass is used for covering solar collectors, for photovoltaic cells and for glazing in construction (all claimed). It can also be used for vehicle windscreens.    ADVANTAGE - Multilayer antireflection coatings based on interference are effective only over a narrow range of wavelengths and not for the broad band solar spectrum, as they greatly increase reflection outside the design wavelengths. Single layers diluted with air to give a very low refractive index are effective but generally not wipe-proof or unsuitable for use on safety glass. The present coatings are suitable for use on safety glass and wipe-proof and have a refractive index up to 1.22.    DETAILED DESCRIPTION - Prestressed safety glass with a wipe-proof and porous silica antireflection layer is claimed. It is produced by coating a glass of the usual type for making prestressed safety glass with a colloidal-disperse solution. This is obtained by hydrolytic condensation of (organo)silane(s) of formula (I) and/or precondensate(s) of (I) with water or moisture, optionally in the presence of a solvent and/or catalyst.    RaSiX4-a (I)    R = an organic group with 1-10 carbon (C) atoms and optionally oxygen (O) and/or sulfur (S) atoms and/or amino groups in the chain;    X = hydrogen (H), halogen, hydroxy (OH), alkoxy, acyloxy, alkylcarbonyl, alkoxycarbonyl or NR's;    R' = H, alkyl or aryl; and    a = 0, 1 or 2    The solution also contains organic polymer(s) with OH and/or imino (NH) group(s) and a molecular weight of 200-500000, as colloidal solution. The molar ratio of polymer to organic modified silane is 0.1-100 mmole/mole silane. The coated glass is dried, heated to not less than 600 degreesC for removing the organic constituents and prestressing and chilled thermally.    An INDEPENDENT CLAIM is also included for the production of the coated safety glass in this way.    DESCRIPTION OF DRAWING(S) - The drawing shows the results of spectral photometric tests on samples exposed to temperatures between 500 and 1000 degreesC.