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An ionic hair dryer is a good example of how positive and negative can work together. While the negative ions infused into your hair by an ion hair dryer make it silky and shiny, it's the positive ions (read: positive energy) that infuses moisture into the hair shaft.
The ionic energy also seals the hair cuticle, locking in moisture. Now your hair can repel humidity in the atmosphere—a very good thing for you curly tops. Your hair will be less vulnerable to static electricity and the frizz will be gone!