It depends on the result. Majirel is a permanent crème colour for rich, long-lasting results and grey coverage. INOA is an ammonia-free permanent colour, ideal for sensitive scalps and a gentler service. Dia Light is an acid demi-permanent for glossing, toning and blending grey without lift, while Dia Richesse gives a natural tone-on-tone finish.

Majirel is mixed 1:1.5 with L'Oreal Majirel Oxydant cream developer — 10 vol (3%) for deposit, 20 vol (6%) for grey coverage, 30 vol (9%) and 40 vol (12%) for lift. INOA is mixed 1:1 with INOA Oxydant. Dia Light uses the dedicated Dia Activateur. Always follow L'Oreal's professional mixing ratios.

Both are permanent colours with excellent coverage. Majirel contains ammonia for reliable lift and a vast shade range. INOA is ammonia-free, using an Oil Delivery System for a more comfortable application and less odour, making it a popular choice for sensitive scalps and a premium service.

Yes. Majirel provides up to 100% grey coverage when professionally formulated with the correct L'Oreal Oxydant developer. For resistant grey, L'Oreal recommends specific formulation techniques — always follow the professional guidelines.