{"product_id":"cosmtek-black-hair-dye-shampoo-semi-permanent-400ml-grey-coverage-conditioning-3-in-1","title":"COSMTEK Black Hair Dye Shampoo — Semi-Permanent 400ml, Grey Coverage \u0026 Conditioning 3-in-1","description":"\u003cp\u003e\u003cstrong\u003eCOSMTEK Black Hair Dye Shampoo is a semi-permanent, color-depositing 3-in-1 shampoo that darkens hair and blends grey in one easy wash.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this shampoo color and cover greys?\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUses a semi-permanent dye system that coats cuticle layers\u003c\/li\u003e\n  \u003cli\u003eWorks on white, grey, or light brown hair to produce a black shade\u003c\/li\u003e\n  \u003cli\u003eColor intensity increases with repeated applications\u003c\/li\u003e\n  \u003cli\u003eDesigned to be milder than permanent dyes and wash out gradually\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs it easy and safe to use at home?\u003c\/h3\u003e\n\u003cp\u003eYes — 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApply to dry hair for best color pickup\u003c\/li\u003e\n  \u003cli\u003eLeave 15–20 minutes then rinse until water runs clear\u003c\/li\u003e\n  \u003cli\u003ePerform a patch test 48 hours prior to full use\u003c\/li\u003e\n  \u003cli\u003eFollow precautions to avoid contact with sensitive areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long does the color last, and how will it affect my hair care?\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eColor fades slowly across multiple washes rather than instant removal\u003c\/li\u003e\n  \u003cli\u003eFrequent shampooing will reduce longevity; cool water helps maintain color\u003c\/li\u003e\n  \u003cli\u003ePairs well with color-protecting conditioners and lower-heat styling\u003c\/li\u003e\n  \u003cli\u003eResults differ by natural hair color and previous treatments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan both men and women use this product, and which hair types suit it best?\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSuitable for women and men seeking grey coverage or shade refresh\u003c\/li\u003e\n  \u003cli\u003eWorks on light brown, grey, and white hair to achieve black tones\u003c\/li\u003e\n  \u003cli\u003eNot recommended for hair with severe damage without a strand test\u003c\/li\u003e\n  \u003cli\u003ePatch tests advised for sensitive scalps or known allergies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho 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.\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: How long do I leave COSMTEK Black Hair Dye Shampoo on?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Apply to dry hair and leave for 15–20 minutes, then rinse thoroughly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this permanently color my hair?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No, it is semi-permanent and deposits color that gradually fades with washes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"COSMTEK","offers":[{"title":"Default Title","offer_id":53435542012251,"sku":"B0B4FXC5WZ","price":28.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/9860\/9243\/files\/cosmtek-black-shampoo-front-bottle.jpg?v=1782315864","url":"https:\/\/remediesbeauty.co.uk\/products\/cosmtek-black-hair-dye-shampoo-semi-permanent-400ml-grey-coverage-conditioning-3-in-1","provider":"REMEDIESBEAUTY","version":"1.0","type":"link"}