Eyebrow Tinting Is Relatively Safe, as Long as There Are No Harmful Chemicals Used in the Dye. However, If You Don't Do a Patch Test Beforehand and It Turns...
Eyebrow tinting is relatively safe, as long as there are no harmful chemicals used in the dye. However, if you don't do a patch test beforehand and it turns out you're allergic to one of the dye ingredients, it could cause burning, irritation and, in severe cases, eyebrow hair loss.
Is tinting your eyebrows a good idea?
Tinting will immediately make brows appear thicker. Tinting enhances your brows, at least temporarily (it lasts about a month—and even up to six weeks if you're lucky). It gives brows a more natural look (versus using a makeup pencil to fill brows).
The oxidizing agent causes the dye molecules to polymerize, or link together, to create intense shades. Is this safe? In a word - No. Oxidative dyes are reactive chemicals that can cause allergic reactions, painful rashes, blistering and even blindness.