Topic
Hair care
Every Vinner Labs guide filed under hair care: 2 articles, newest first.
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Hair dyes and lightening agents: technical differences for a layperson
Temporary, semi-permanent, demi-permanent and permanent colour compared: how deep each penetrates, how long it lasts, and what bleaching does to hair.
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The chemistry behind hair dyes and hair treatments
How oxidative hair colour works (alkalisers, developer, primary intermediates and couplers) and why PPD allergy makes patch testing non-negotiable.