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  2. Science Projects on Hair Dye

    • Dye and Hair Strength One of the most popular science fair projects involving dye is to test the effects of hair dye on on hair strength.
    • Dye and Water Hardness Water hardness is a description of how many minerals exist in the water.
    • Natural Hair Color and Dying Time
    • Shampoo and Hair Dye
    sciencing.com/science-projects-hair-dye-6889848.html
    sciencing.com/science-projects-hair-dye-6889848.html
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    How do you do a hair dye experiment?To run a few basic experiments, all you'll need is water, hair dye and sample hair. One of the most popular science fair projects involving dye is to test the effects of hair dye on on hair strength. The setup for this project is simple. First, conduct a series of strength tests on hair that has not been dyed and record the results.
    How do hair dyes work?The reactions which produce the dyes are carried out at an alkaline pH, and in many cases this is provided by the presence of ammonia in the formulation. The ammonia causes the cuticles of the hair to swell, which then allows the dye molecules to pass into the hair and induce permanent colouring.
    How long have humans been using hair dye?Humans have dyed for thousands of years (see box ). But the chemical history of modern hair dyes reveals that, while they were once part of an innovative industry, progress has stalled, and today they rely on 125-year-old chemistry. Archaeological evidence shows that the use of dyes by humans dates back to the Palaeolithic period.
    Is hair dye technology 'Crazy'?For 125 years, the oxidative reaction of PPD has been the extent of hair dye technology. This is “crazy” according to David Lewis, emeritus professor at the University of Leeds in the UK. “Now, I know a lot about dyes and dye stuffs in the textile industry.
     
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