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Creata pagina con "The silver surface processing called ''tula'', better known in jewelery as ''niello'', is one of the variants used to made overlay decorations during in the early peri..."
The silver surface processing called ''tula'', better known in jewelery as ''[[niello]]'', is one of the variants used to made [[overlay]] decorations during in the early period of fountain pens. This process was typical of European production (and in particular has been used by [[Kaweco]]).