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By Dr. Alistair Clark Intense pulsed light, or IPL, is a term used to describe the delivery of extremely high energy from a light source. This applies to laser, which is a single, specific wavelength of laminar light rays. IPL by contrast, is a broad spectrum of confluent, non-parallel light.
As book and stationery stores stack their shelves with the latest trend for adult hobbyists – complex colouring-in books – we take a look at the psychological benefits of this intricate activity, and its roots in ancient culture Carl Jung was one of the first Western psychologists to introduce colouring