Explore the Zestchest Knowledge Library
Explore practical guides to cosmetic formulation, ingredients and product making, based on workshops and teaching by Dr. Soma Datta. Choose a topic below to explore detailed guides and focused answers to common formulation questions.
Explore Topics
Explore our knowledge guides by topic. Each collection brings together an in-depth guide and focused articles answering specific questions.
Ubtan
Explore Ubtan ingredients, benefits, skin types, traditional uses and formulation principles, with detailed guides to clays, turmeric, activated charcoal and powder versus paste Ubtan.
Japanese Konjac Jelly Soap
Explore Japanese konjac jelly soaps—from the role of konjac and the cleansing system to its jelly structure, skin-care ingredients, different variations and practical formulation considerations.
Fabric Conditioner
Explore how fabric conditioner works, why it makes clothes feel softer and smoother, how to use it correctly, common mistakes to avoid, and practical considerations for different types of fabric.