Familiarize yourself with how to perform a pull test as part of a hair extension consultation in this foundation MHD tutorial with Inanch Emir.
Explore how to perform a colour test in this essential MHD testing tutorial with Tracey Sajno. A colour test is performed during colour development to check the target colour and development time.
Learn how to perform an incompatibility test in the essential MHD testing video with Tracey Sajno. An incompatibility test checks for the presence of metallic salts, before a chemical service.