blacking
  黑色鞋油,黑色塗料
  black·ing, n.
  1. Any preparation for making things black; esp. one for giving a black luster to boots and shoes, or to stoves.
  2. The act or process of making black.
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  Black, v. t. [imp. & p. p. Blacked; p. pr. & vb. n. Blacking.]
  1. To make black; to blacken; to soil; to sully.
     They have their teeth blacked, both men and women, for they say a dog hath his teeth white, therefore they will black theirs.   --Hakluyt.
     Sins which black thy soul.   --J. Fletcher.
  2. To make black and shining, as boots or a stove, by applying blacking and then polishing with a brush.
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  blacking
       n : a substance used to produce a shiny protective surface on
           footwear [syn: shoe polish]