COSMTEK Black Hair Color Shampoo 500ml — Ammonia-Free 3-in-1 Dye for Hair & Beard, Lasts 4–5 Weeks

COSMTEK Black Hair Dye Shampoo is a 3-in-1 color-depositing shampoo that temporarily darkens hair and beard while cleansing and conditioning, delivering a natural black tone that lasts about 4–5 weeks per application.

This easy-to-use hair color shampoo combines gentle cleansing with natural conditioning oils to cover gray and lighten-looking areas without ammonia or sulfates. The 500ml bottle is formulated for both men and women and can be used on head hair and facial hair. It deposits pigment during a normal shampoo step, smoothing frizz and adding shine thanks to argan oil, olive oil, and turmeric extracts. For best outcomes, perform the recommended allergy patch test 24 hours before first use.

How do I use COSMTEK Black Hair Dye Shampoo for reliable results?

Use the color shampoo on wet or dry hair, though wet application typically gives more even coverage. Apply an amount suited to your hair volume, massage in like regular shampoo, leave for 5–10 minutes and rinse thoroughly. For very thick hair, leave the product on 1–2 minutes longer to deepen pigment uptake.

• Wet hair recommended for even color distribution.
• Massage thoroughly from roots to ends for full coverage.
• Standard leave time: 5–10 minutes; add 1–2 minutes for dense hair.
• Rinse until water runs clear and style normally.

Will this shampoo damage my hair or beard?

The COSMTEK formula avoids harsh ammonia, sulfates, and certain preservatives to reduce drying and chemical stress. It contains conditioning ingredients like argan and olive oils and turmeric to help smooth the hair surface and control frizz after coloring. Still, it’s not a permanent chemical dye; regular conditioning and gentle styling maintain health and appearance.

• Ammonia- and sulfate-free formula for gentler color depositing.
• Argan and olive oils provide moisture and shine.
• Turmeric helps improve surface smoothness and manageability.
• Suitable for both hair and beard with routine aftercare.

How long does the color last and how often should I use it?

Color results are semi-permanent and typically last about 4–5 weeks after a single use, depending on hair porosity, washing frequency, and styling products. To sustain a consistent black tone, many users reapply every two weeks; occasional touch-ups can extend evenness between full applications.

• Average retention: 4–5 weeks per application.
• Recommended refresh interval: about every 15 days for continuous color.
• Longevity varies with shampoo frequency and hair texture.
• Works for head hair, gray blending, and beard darkening.

Is it safe to use and are there precautions I should take?

Safety is improved by the absence of ammonia and sulfates, but a patch test is advised before full use to check for sensitivity. Apply a small amount behind the ear and wait 24 hours; if there is no irritation, proceed. Avoid contact with eyes; if contact occurs, rinse thoroughly with water.

• Perform a 24-hour allergy patch test before first use.
• Avoid eye contact and seek medical advice if irritation occurs.
• Keep out of reach of children and store in a cool, dry place.
• Full ingredient list is visible on the packaging for transparency.

Who this product is for: COSMTEK Black Hair Dye Shampoo is aimed at adults who want a low-effort way to darken gray or lightened hair and beard without harsh chemical dyes. It’s a practical choice for busy people seeking quick coverage during regular washing, those who prefer ammonia-free formulas, and anyone wanting conditioning benefits alongside color deposit in a 500ml supply-sized bottle. If you need a permanent chemical color, opt for salon or professional permanent dyes; if you want temporary but dependable darkening with conditioning, this COSMTEK shampoo is designed for that use.

Ingredients

Ginseng