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Old 10-19-2014, 05:46 AM
  #3  
ManiacQuilter2
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Join Date: Jun 2011
Location: Southern California
Posts: 19,131
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PaperPrincess is correct. When you start quilting, the needle and thread will make tiny holes in the backing. I have never heard of anyone wanting to waterproof the backing of a quilt. If a quilt has an accident, it can always be easily washed.
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