so what brand ???
Here's hoping it isn't L'oreal Excellence or Clairol Root Touch Up!
It’s not a specific brand but the ingredients that causes the reaction. Check the label.
http://www.inquisitr.com/1368507/ncis-star-pauley-perrettes-gothic-hair-dye-landed-her-in-the-er/ “Para-Phenylenediamine (PPD) is what gives the dyes the ability to cover grey and causes the color to last. And it is banned in many countries of the European Union. It was “voted Allergen Of The Year in 2006 by the American Contact Dermatitis Society.””