{"product_id":"american-crew-classic-developer-450ml-15-vol-4-5","title":"American Crew Classic Developer 450ml - 15 Vol. 4.5%","description":"\u003cp\u003e15 volume developer mixed into American Crew's base formula — designed to work with their colour range without the burn that comes from standard off-the-shelf developers. The 4.5% peroxide lifts without stripping, so regrowth blends cleanly and faded colour picks up without the harsh edge.\u003c\/p\u003e\u003cp\u003e450ml bottle covers a full head application, sometimes two depending on hair density. Mix at a 1:2 ratio with American Crew colour and process for 30–40 minutes. Works for men's hair colour touch-ups and full coverage — a safer base than reaching for salon-only formulas.\u003c\/p\u003e","brand":"American Crew","offers":[{"title":"Default Title","offer_id":57391532835193,"sku":"N810029","price":16.99,"currency_code":"GBP","in_stock":false}],"url":"https:\/\/www.checkoutbeauty.com\/products\/american-crew-classic-developer-450ml-15-vol-4-5","provider":"Checkout Beauty","version":"1.0","type":"link"}