Page 38 - HAIR COLOUR
P. 38

Summary:

                   Semi-permanent colour just colours the cuticle scales. The cuticle scales
                   are transparent without any pigments so white light passes through like
                   glass. Once the cuticle scales are dyed, they turn into colour filters like
                   what you would put on a torch to give different colour light beams.  The
                   colour from the pigments now reflected is mixed with the single wavelengths from the
                   filters.





























































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