True Colours: Hair Colouring for the Curious and the Cautious by Milly Ahlquist & Mark Constantine

Discover the history and science of hair color and hair dye, both synthetic and herbal, from its origins in the ancient world to the health scandals of the 20th century. Learn about the effect colorants may have on your health, and how to minimize that risk. Includes the story of henna hair color within Lush, with practical tips for henna application from trichologist and Lush co-founder, Mark Constantine. Written by Milly Ahlquist and Lush Co-Founder Mark Constantine and printed with Lush’s unique 20% henna ink blend, this book has reworked and updated Mark’s original Herbal Hair Colouring book, first published in 1978.