Decorating of the halos of Christ
Decorating of the halos of Christ and St Maurus is effected by the technique of Niello. Into the silver lamina the decoration is engraved - cloaked by the mixture acquired by melting silver, lead and brimstone (sulphur) and by subsequent pulverization. The mixture is applied in an analogous way like enamel, niello however has a lower fusing temperature. In this case the niello plate (lamina) is imbedded into another gilded copper lamina, whose edgings are decorated by minted ornaments.