Hair Curler

Abstract

A hair curler ( 1 ) includes a base body ( 2 ) including a center portion ( 3 ) being designed and arranged to support hair to be wound up. The hair curler ( 1 ) includes a first thermochromic substance ( 20 ) being designed and arranged to indicate a first temperature during a temperature increase of the hair curler ( 1 ) within a first temperature range by a first color change. The hair curler ( 1 ) includes a second thermochromic substance ( 35 ) being designed and arranged to indicate a lower second temperature during a temperature decrease of the hair curler ( 1 ) within a lower second temperature range by a second color change.

1 . A hair curler for winding up human hair, comprising:
 a base body, said base body including a center portion being designed and arranged to support hair to be wound up;   a first thermochromic substance, said first thermochromic substance being designed and arranged to indicate a first temperature during a temperature increase of said hair curler within a first temperature range by a first color change; and   a second thermochromic substance, said second thermochromic substance being designed and arranged to indicate a lower second temperature during a temperature decrease of said hair curler within a lower second temperature range by a second color change.   
   
   
       2 . The hair curler of  claim 1 , wherein said base body is made of plastic and said first thermochromic substance is a first thermochromic plastic and said second thermochromic substance is a second thermochromic plastic. 
   
   
       3 . The hair curler of  claim 2 , wherein said first thermochromic plastic and said second thermochromic plastic are mixed with said plastic of said base body. 
   
   
       4 . The hair curler of  claim 2 , wherein said first thermochromic plastic is a material indicating the first temperature by the first color change after blow-drying the hair for approximately 2 to 3 minutes. 
   
   
       5 . The hair curler of  claim 2 , wherein said second thermochromic plastic is a material indicating the lower second temperature after cooling down for approximately 12 to 20 minutes after blow-drying the hair. 
   
   
       6 . The hair curler of  claim 5 , wherein said second thermochromic plastic is a material indicating the lower second temperature after cooling down for approximately 12 to 20 minutes after blow-drying the hair. 
   
   
       7 . The hair curler of  claim 1 , wherein said base body is made of a material including approximately between 2% and 6% of said first thermochromic substance and approximately between 2% and 6% of said second thermochromic substance. 
   
   
       8 . The hair curler of  claim 2 , wherein said first thermochromic plastic and said second thermochromic plastic are mixed with the plastic of a part of said hair curler other than said base body. 
   
   
       9 . The hair curler of  claim 2 , wherein said first thermochromic plastic and said second thermochromic plastic are designed as at least one coating of said base body. 
   
   
       10 . The hair curler of  claim 2 , wherein said first thermochromic plastic and said second thermochromic plastic are designed as at least one coating of a part of said hair curler other than said base body. 
   
   
       11 . The hair curler of  claim 2 , wherein said base body is made of at least one plastic material selected from the group consisting of polypropylene, polyethylene, polystyrene, acrylic styrene, polyvinyl chloride, polyamide and polyethylene terephthalate a respective plastic foam. 
   
   
       12 . The hair curler of  claim 11 , wherein said base body is made plastic foam.