sgraf·fi·to /zgræˈfi(ˌ)to, skræ-/
  對比畫法
  Sgraf·fi·to a.  Paint. Scratched; -- said of decorative painting of a certain style, in which a white overland surface is cut or scratched through, so as to form the design from a dark ground underneath.
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  sgraffito
       n : a ceramic or mural decoration made by scratching off a
           surface layer to reveal the ground
       [also: sgraffiti (pl)]