💇 Hairdresser & cosmetology tools
Developer overview + quiz — for hairdressers, cosmetics and nails.
🧪 H2O2 developers at a glance
3 %
Vol 10 · tinting/grey
6 %
Vol 20 · 1–2 levels
9 %
Vol 30 · 2–3 levels
12 %
Vol 40 · strong lightening
Guidelines — manufacturer instructions and patch test are binding.
🎓 Hairdresser exam trainer
20 questions
⭐ Score: 0/0
🔥 Streak: 0
🏆 0
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🏆 Leaderboard
TOP-10
Practice values — manufacturer and hygiene rules apply.