Per Jeff Adkins question in 111217 MMDigest:  Personally I have tried
a lot of things, but I found that placing the infected roll and box
in a tent with my air purifier and letting out the first few feet of
paper works quite nicely and does not damage the paper.  A small tent
or closet should be used as you don't want your purifier around your
piano.  For really bad boxes -- scrap them, use a new box and make
a repro label.

Dave Haibach