Clairol Colour Strong - 4.0 Dark Brown

The AHA Bonding Treatment is a unique ingredient in Clairol Colour Strong that uses Alpha Hydroxy Acids to seal the colour into the hair cuticle like a top coat. It also works to reinforce the hair's structure, making it feel stronger and healthier after colouring.

Clairol Colour Strong is formulated without ammonia, which can be less irritating than ammonia-based dyes. However, individual sensitivities vary. Always perform a 48-hour allergy patch test before each use to check for potential reactions, even if you've used hair dye before.

As a permanent hair dye, Clairol Colour Strong's colour will not wash out. Its longevity on your hair primarily depends on hair growth and proper care. The AHA Bonding Treatment helps to lock in colour for extended vibrancy. You will typically need to re-colour your roots every 4-6 weeks.

While the product is generally suitable for previously coloured hair, applying dark brown to bleached or highlighted hair can yield unpredictable results, potentially appearing ashier or absorbing more intensely. It's recommended to consult the instruction leaflet or a professional for guidance in such cases.

Info needed: [Standard hair dyes often contain PPD (para-phenylenediamine) or similar ingredients which can cause allergic reactions. The product instructions will have a full ingredients list and allergy advice.] It is crucial to perform the 48-hour patch test even with ammonia-free formulas.

While listed for 'Female' in attributes, hair dye formulas are generally suitable for anyone wishing to colour their hair to the specified shade. The 'gender' attribute typically reflects marketing segmentation. Always follow instructions and perform a patch test as directed.

Multidimensional colour means the dye creates various tones and reflections within the dark brown shade, rather than a flat, uniform colour. This gives the hair a more natural, vibrant, and dynamic look that catches light differently and adds depth.

Final colour depends on initial hair shade, texture, and processing time. Ensure you followed the instructions precisely, especially development time. If too dark, it may lighten slightly after a few washes. If too light, you may need a second application after a waiting period, but consult product instructions first.

Ensure the product was applied generously to grey areas first, as they can be more resistant. Check that the processing time was strictly adhered to. If grey is very resistant, a longer development time (within manufacturer's recommendations) or specific grey coverage techniques might be needed next time.

While Clairol Colour Strong includes an AHA Bonding Treatment to reinforce hair, proper aftercare is crucial. Use the conditioning treatment provided, and regularly use colour-safe, deeply moisturizing conditioners or masks. Avoid excessive heat styling and harsh chemical treatments.

Immediately rinse the product from your hair and scalp. This could be a sign of sensitivity or an allergic reaction. Always perform a patch test 48 hours before each application to prevent severe reactions. Do not use the product again if irritation persists.

To prolong colour, use sulphate-free, colour-safe shampoos and conditioners. Avoid frequent washing with hot water, and protect hair from sun exposure and chlorinated water. The AHA Bonding Treatment helps seal colour, but external factors can still cause fading.