Dia Light 4

L'Oréal Professionnel Dia Light 4 Brown is an acidic demi-permanent gloss color specifically formulated to tone, refresh, and enhance color-treated or sensitized hair without ammonia or lift. This ammonia-free formula is enriched with a 1% Hyaluronic Complex that instantly replenishes lost moisture, providing 2x more hydration, 82% glossier color, and helping to preserve cortex integrity with 3x less breakage after bleach .

Ideal for glossing services to add shine, toning services to neutralize unwanted undertones after lightening, and refreshing services to revive faded color on lengths and ends, Dia Light offers versatile service opportunities for professional stylists . The formula also enables French Blending™ services, which blend grey hair naturally without harsh regrowth lines .

The milky cream consistency ensures precision application and even color distribution . Mix at a 1:1.5 ratio with DIActivateur 6-vol (1.8%) for soft deposit, 9-vol (2.7%) for standard tone-on-tone results, or 15-vol (4.5%) for stronger opacity and up to 1.5 levels of darkening . Development time ranges from 2 to 20 minutes depending on desired intensity .

This product is intended for professional use only. To use, mix 1 tube (50ml) of Dia Light 4 Brown with 75ml of DIActivateur Developer at the desired volume, apply to dry, unwashed hair using sectioning techniques, process for 2-20 minutes, then emulsify, rinse thoroughly, and follow with a post-color shampoo. Always perform a patch test 48 hours before any coloring service.