Blond Studio Instant Highlights Lightening Cream is the second part of L’Oréal Professionals Instant Highlights 3 part-system, unlocking 6 levels of lift in as little as 30 seconds! Thanks to Pro-Heat Technology, that is designed to work in perfect harmony with heat, for a safe, controlled lift and maximum heat protection. An enriched unique blend of concentrated oil possessing a distinct texture that ensures no-swelling, dripping or cracking Mixing ratio is 1:2 with L’Oréal Professional cream developers, 20 vol or 30 vol.