COSMTEK Black Hair Dye Shampoo — Semi-Permanent 400ml, Grey Coverage & Conditioning 3-in-1

COSMTEK Black Hair Dye Shampoo is a semi-permanent, color-depositing 3-in-1 shampoo that darkens hair and blends grey in one easy wash.

This color-depositing shampoo combines cleansing, conditioning, and gradual color in a single bottle. The upgraded formula is designed for simple at-home use: apply to dry hair, leave 15–20 minutes, then rinse. Results vary by natural hair shade and porosity, so performing a patch test and reading instructions first helps set realistic expectations.

How does this shampoo color and cover greys?

The product deposits color molecules onto the hair shaft instead of permanently altering internal structure. With repeated use you can build intensity, and a single 15–20 minute application shows visible darkening on many light to medium tones.

• Uses a semi-permanent dye system that coats cuticle layers
• Works on white, grey, or light brown hair to produce a black shade
• Color intensity increases with repeated applications
• Designed to be milder than permanent dyes and wash out gradually

Is it easy and safe to use at home?

Yes — the routine matches standard at-home color-deposit shampoos: apply to dry hair, leave for the recommended time, then rinse thoroughly. Safety instructions advise an allergy patch test and avoiding contact with eyes, mouth, nose, or broken skin.

• Apply to dry hair for best color pickup
• Leave 15–20 minutes then rinse until water runs clear
• Perform a patch test 48 hours prior to full use
• Follow precautions to avoid contact with sensitive areas

How long does the color last, and how will it affect my hair care?

The shampoo deposits temporary pigment that fades gradually with subsequent washes; frequency of touch-ups depends on how often you shampoo and hair porosity. Because it conditions while coloring, it aims to minimize dryness, but using color-safe or sulfate-free maintenance shampoos will help preserve shade.

• Color fades slowly across multiple washes rather than instant removal
• Frequent shampooing will reduce longevity; cool water helps maintain color
• Pairs well with color-protecting conditioners and lower-heat styling
• Results differ by natural hair color and previous treatments

Can both men and women use this product, and which hair types suit it best?

The formula is unisex and intended for a wide range of hair types, including straight, wavy, and mildly textured hair. It’s particularly suited for people looking to blend greys or refresh a dark shade without committing to permanent dye.

• Suitable for women and men seeking grey coverage or shade refresh
• Works on light brown, grey, and white hair to achieve black tones
• Not recommended for hair with severe damage without a strand test
• Patch tests advised for sensitive scalps or known allergies

Who is this for: COSMTEK Black Hair Dye Shampoo is ideal for anyone who wants a straightforward, low-commitment way to darken hair or blend greys at home. It fits daily life for busy people who prefer a 3-in-1 product that cleanses, conditions, and deposits color, and for those experimenting with shade intensity before choosing a permanent option.