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Hi, In today's video, I'll show you the most important hair dye product that will help you color your hair effectively. In the video, you'll learn: How to properly dye your hair? What is hydrogen peroxide used for? What effect does a hair colorant have on hair coloring? Why is a hair colorant one of the most important hair coloring products? What developer percentage should I use for tone-on-tone coloring? What question did I have on my apprentice exam? You'll find the answers to these and many more questions in this video! WANT TO LEARN MORE ⁉️ Buy one of my courses: https://www.fundament.fengii.pl/sklep/ My FACEBOOK:   / fengiifundament   My INSTAGRAM:   / fengii_   My TikTok: https://www.tiktok.com/@fengii_?lang=... Enjoy watching Fengii ✌️