COSMTEK Black Color-Depositing Shampoo for Grey Coverage — 400ml, Semi-Permanent 3-in-1 Cleanse & Condition

COSMTEK Black Hair Dye Shampoo is a semi-permanent, color-depositing 3-in-1 shampoo that quickly darkens grey or light hair while cleansing, conditioning, and refreshing color in a single 400ml bottle.

This concentrated black hair dye shampoo is designed for people who want an easy at-home way to darken grey, white, or light brown hair without a permanent dye process. The formula deposits pigment while you shampoo, giving gradual to immediate darkening depending on hair porosity and starting shade. It’s intended for routine use to maintain color, reduce visible grey, and add shine with minimal fuss.

How do I use COSMTEK Colored Shampoo for reliable grey coverage?

Use the shampoo on dry or towel-dried hair as directed to allow pigment to sit and bond with the hair surface. Leave the product on for 15–20 minutes to achieve the noted depth, then rinse thoroughly; repeat weekly or as needed to build intensity.

• Apply to dry or damp hair for best pigment pickup.
• Work evenly from roots to ends for consistent color.
• Leave 15–20 minutes; longer waits may deepen color.
• Rinse thoroughly and style as usual.

Will this shampoo work on my hair color and type?

The semi-permanent pigment performs best on grey, white, or light brown hair and can slightly darken already natural or colored hair. Results vary with hair porosity, previous chemical treatments, and natural shade, so expect gradual changes for darker base colors and stronger change on lighter strands.

• Light/porous hair shows faster, fuller coverage.
• Dark brown or chemically-treated hair may show subtler change.
• Fine and coarse textures both accept pigment; timing affects depth.
• Perform a strand test to preview results before full use.

Is this product safe and easy to include in my routine?

The upgraded formula is made for routine at-home use, simplifying color maintenance by combining cleansing and depositing steps. Always patch-test for allergies, avoid contact with eyes and open wounds, and follow the caution guidance to reduce sensitivity risks.

• Patch test before first use to check for reactions.
• Avoid contact with eyes, mouth, and broken skin.
• Use as a replacement for or alongside regular shampoo sessions.
• Rinse thoroughly after the recommended processing time.

How long does the color last and how do I maintain it?

Because this is a semi-permanent, color-depositing shampoo, the effect is gradual and refreshed with repeated applications rather than permanent. Frequency of use, water hardness, and shampooing habits will influence longevity; maintenance includes periodic reapplications and using color-safe haircare.

• Expect color to fade gradually with regular washing.
• Use color-safe conditioners and cooler water to extend wear.
• Reapply weekly or as needed for visible grey coverage.
• Store away from direct heat and sunlight to protect formula.

Who is this for: COSMTEK Black Hair Dye Shampoo suits anyone seeking a low-commitment method to darken greys, refresh existing black shades, or subtly change lighter hair tones without harsh permanent dyes. It’s a practical choice for busy people, first-time color users who want an easy at-home solution, and those looking to maintain color between salon visits. Always review the ingredient table, perform an allergy patch test, and conduct a small strand test if you have previous chemical treatments to anticipate final results.