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In page Shellac:

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Shellac is used:

  • as a topcoat in nail polish (although not all nail polish sold as "shellac" contains shellac, and some nail polish not labelled in this way does).[citation needed]
  • in sculpture, to seal plaster and in conjunction with wax or oil-soaps, to act as a barrier during mold-making processes.[citation needed]
  • as a dilute solution in the sealing of harpsichord soundboards, protecting them from dust and buffering humidity changes while maintaining a bare-wood appearance.[citation needed]