{"product_id":"cosmtek-black-hair-color-shampoo-500ml-ammonia-free-3-in-1-dye-for-hair-beard-lasts-4-5-weeks","title":"COSMTEK Black Hair Color Shampoo 500ml — Ammonia-Free 3-in-1 Dye for Hair \u0026 Beard, Lasts 4–5 Weeks","description":"\u003cp\u003e\u003cstrong\u003eCOSMTEK 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.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I use COSMTEK Black Hair Dye Shampoo for reliable results?\u003c\/h3\u003e\n\u003cp\u003eUse 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWet hair recommended for even color distribution.\u003c\/li\u003e\n  \u003cli\u003eMassage thoroughly from roots to ends for full coverage.\u003c\/li\u003e\n  \u003cli\u003eStandard leave time: 5–10 minutes; add 1–2 minutes for dense hair.\u003c\/li\u003e\n  \u003cli\u003eRinse until water runs clear and style normally.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this shampoo damage my hair or beard?\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAmmonia- and sulfate-free formula for gentler color depositing.\u003c\/li\u003e\n  \u003cli\u003eArgan and olive oils provide moisture and shine.\u003c\/li\u003e\n  \u003cli\u003eTurmeric helps improve surface smoothness and manageability.\u003c\/li\u003e\n  \u003cli\u003eSuitable for both hair and beard with routine aftercare.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long does the color last and how often should I use it?\u003c\/h3\u003e\n\u003cp\u003eColor 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAverage retention: 4–5 weeks per application.\u003c\/li\u003e\n  \u003cli\u003eRecommended refresh interval: about every 15 days for continuous color.\u003c\/li\u003e\n  \u003cli\u003eLongevity varies with shampoo frequency and hair texture.\u003c\/li\u003e\n  \u003cli\u003eWorks for head hair, gray blending, and beard darkening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs it safe to use and are there precautions I should take?\u003c\/h3\u003e\n\u003cp\u003eSafety 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePerform a 24-hour allergy patch test before first use.\u003c\/li\u003e\n  \u003cli\u003eAvoid eye contact and seek medical advice if irritation occurs.\u003c\/li\u003e\n  \u003cli\u003eKeep out of reach of children and store in a cool, dry place.\u003c\/li\u003e\n  \u003cli\u003eFull ingredient list is visible on the packaging for transparency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho 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.\u003c\/p\u003e\n\u003ch3\u003eIngredients\u003c\/h3\u003e\n\u003cp\u003eGinseng\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this on a beard and scalp?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. COSMTEK is formulated for both head hair and beard to darken gray areas when used as directed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long should I leave the shampoo on for best color?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Leave it 5–10 minutes; thick hair may benefit from an extra 1–2 minutes for deeper color.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"COSMTEK","offers":[{"title":"Default Title","offer_id":53431008887131,"sku":"B0BC1SPT9V","price":32.01,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/9860\/9243\/files\/cosmtek-front-label-500ml.jpg?v=1782258498","url":"https:\/\/remediesbeauty.co.uk\/products\/cosmtek-black-hair-color-shampoo-500ml-ammonia-free-3-in-1-dye-for-hair-beard-lasts-4-5-weeks","provider":"REMEDIESBEAUTY","version":"1.0","type":"link"}