L'Oreal Blond Studio Lightening Oil Clients after natural-looking sunkissed effects The innovative Blond Studio Lightening Oil enables you to create precisely that! The innovative gel texture ammonia-free formula can be applied using freehand techniques for subtle sunkissed results or as a lightening shampoo for an all-over lighter look. Blond Studio Lightening Oil delivers up to 2 levels of lift in just 30 minutes - great for achieving the perfect blonde in no time at all.