{"product_id":"cosmtek-dark-brown-hair-dye-shampoo-500ml-3-in-1-color-depositing-sulfate-free-conditioning-formula","title":"COSMTEK Dark Brown Hair Dye Shampoo 500ml — 3‑in‑1 Color‑Depositing, Sulfate‑Free Conditioning Formula","description":"\u003cp\u003e\u003cstrong\u003eCOSMTEK Dark Brown Hair Dye Shampoo is a 3-in-1 color-depositing shampoo that instantly darkens gray and light hair while cleansing and conditioning for up to 4–5 weeks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 500ml formula blends pigments with conditioning oils so you can refresh or change your shade during routine washing. Designed for use on damp hair, the product deposits rich dark brown color in 15–20 minutes while smoothing frizz and adding shine. The updated formula is free of sulfates, ammonia, and added preservatives, and it includes argan oil, olive oil and turmeric to help keep hair soft and manageable after coloring.\u003c\/p\u003e\n\n\u003ch3\u003eHow quickly will I see color results?\u003c\/h3\u003e\n\u003cp\u003eMost users notice a visible darkening after a single 15–20 minute application on wet hair. Results vary by starting hair shade and porosity; lighter or gray hair accepts pigment faster, while very thick hair may need extra processing time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApply to wet hair like a regular shampoo for even distribution.\u003c\/li\u003e\n  \u003cli\u003eLeave on 15–20 minutes; 1–2 extra minutes may help very thick hair.\u003c\/li\u003e\n  \u003cli\u003eRinse thoroughly until water runs clear to avoid patchiness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this damage or dry out my hair?\u003c\/h3\u003e\n\u003cp\u003eThe COSMTEK formula was upgraded to exclude sulfates, ammonia and common preservatives, and it includes moisturizing oils to reduce frizz and dryness. It conditions while depositing color, so hair feels softer than many permanent dyes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eArgan oil and olive oil add hydration and shine.\u003c\/li\u003e\n  \u003cli\u003eTurmeric supports smooth, manageable texture without harsh chemicals.\u003c\/li\u003e\n  \u003cli\u003eSuitable for color-treated hair as a refresh between salon visits.\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\u003eExpect the dark brown tint to hold for about 4–5 weeks after an application; fading depends on hair washing frequency and products used. For continuous color and shine, reapply roughly every 15 days or as needed to maintain depth.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle application provides up to 4–5 weeks of tone retention.\u003c\/li\u003e\n  \u003cli\u003eReapply every ~15 days to preserve saturation and gloss.\u003c\/li\u003e\n  \u003cli\u003eUse color-safe or sulfate-free shampoos to extend wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use it safely and get the best coverage?\u003c\/h3\u003e\n\u003cp\u003ePerform an allergy patch test 24 hours before full use by applying a small amount behind the ear. Use the shampoo on damp hair, choose amounts based on hair volume, and leave it on the recommended time for even coverage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDo an allergy test behind the ear and wait 24 hours.\u003c\/li\u003e\n  \u003cli\u003eApply to wet hair and massage from roots to ends for uniform color.\u003c\/li\u003e\n  \u003cli\u003eAdjust quantity and processing time for very thick or coarse hair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: COSMTEK Dark Brown Hair Dye Shampoo is made for men and women who want an easy at-home color refresh that combines cleansing and conditioning in one step. It suits people with gray, light brown, or previously colored hair looking for a natural dark brown shade without harsh dyes. Ideal for busy routines, those avoiding ammonia and sulfates, and anyone wanting temporary-to-semi-permanent color that washes down over weeks rather than lasting permanently.\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 COSMTEK on bleached or very light hair?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it deposits dark brown pigment on light or bleached hair, but results vary; do a strand test first to check tone and processing time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this shampoo safe for color-treated hair?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The formula is designed to refresh color and contains conditioning oils to be safe for previously dyed hair.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"COSMTEK","offers":[{"title":"Default Title","offer_id":58361788301699,"sku":"B0BC1QQWN6","price":29.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1023\/2696\/0515\/files\/cosmtek-dark-brown-front-bottle.jpg?v=1782807732","url":"https:\/\/origin-beauty.com\/products\/cosmtek-dark-brown-hair-dye-shampoo-500ml-3-in-1-color-depositing-sulfate-free-conditioning-formula","provider":"Origin Beauty","version":"1.0","type":"link"}