{"product_id":"aluminium-potassium-mordant","title":"ALUMINIUM POTASSIUM MORDANT","description":"\u003ch1\u003e\u003cspan\u003eAlum Mordant\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003ePotassium Aluminium Sulphate Dodecahydrate\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePotassium Alum is the most commonly used mordant for wool, silk and many natural dyes. It helps suitable plant dyes bond with the fibre and generally produces clear, bright colours without darkening them.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor protein fibres, use \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e7.5–15% WOF - \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eweight of dry fibre.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCotton, linen and other cellulose fibres require a different mordanting method. Alum should not be used alone on cellulose.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAt a glance\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eFeature\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePotassium alum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eChemical name\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePotassium aluminium sulphate dodecahydrate\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFormula\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eKAl(SO₄)₂·12H₂O\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCAS number\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7784-24-9\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eForm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWhite crystalline powder\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProtein fibres\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWool, silk and other animal fibres\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSuggested quantity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7.5–15% WOF\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCellulose fibres\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUse with tannin and soda ash, or prepare aluminium acetate\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eColour effect\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGenerally clear and bright\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eNot required for\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIndigo and woad vats\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eHow much to use\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eFor wool and other protein fibres, begin with:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e7.5% WOF\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for paler shades or minimum mordant residue\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e10% WOF\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e as a general starting point\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003e12–15% WOF\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for deeper shades\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eWOF means weight of dry fibre. For example, 10% WOF is 10g Alum for 100g dry fibre.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMore Alum does not automatically produce stronger or more colourfast results. Use the lowest amount that works well for your fibre and dye.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCold mordanting wool\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eCold mordanting is our preferred method for wool.\u003c\/span\u003e\u003c\/p\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eWeigh the dry fibre and calculate 7.5–15% WOF Alum.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSoak the fibre thoroughly in water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDissolve Alum in a small amount of hot water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdd it to a container of cool water and stir.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdd the wetted fibre and ensure it is fully immersed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eLeave for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e24–72+ hours\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, moving the fibre occasionally.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove, rinse and dye immediately, or dry for future use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003eCream of tartar is not required for cold mordanting.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eHot mordanting wool\u003c\/span\u003e\u003c\/h2\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eWeigh the dry fibre and calculate 7.5–15% WOF Alum.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSoak the fibre thoroughly.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDissolve the Alum in hot water and add it to the mordanting pot.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eOptional: add up to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e5% WOF cream of tartar\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdd the wetted fibre.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSlowly raise the bath to approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e80°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHold for one hour, moving the fibre gently.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAllow it to cool before rinsing.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003eAvoid boiling or excessive movement, as this may felt wool.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSilk\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eFor silk, begin with \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e7.5–10% WOF Alum\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCold mordanting is particularly suitable. Handle delicate silk gently and sample first.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCotton, linen and other cellulose fibres\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eAlum alone is not a complete mordant for cellulose fibres.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor cotton, linen and hemp, use one of our complete cellulose methods:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/appleoakfibreworks.com\/blogs\/news\/how-to-mordant-linen-and-cotton-fabrics-successfully?utm_source=chatgpt.com\"\u003e\u003cspan\u003eTannin followed by Alum and soda ash\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/appleoakfibreworks.com\/blogs\/news\/how-to-mordant-linen-and-cotton-successfully-without-tannins?utm_source=chatgpt.com\"\u003e\u003cspan\u003eAluminium acetate followed by chalk\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eDo not use the wool recipe directly on cotton or linen.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eGood to know\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDissolve Alum completely before adding the fibre.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWet the fibre thoroughly for even uptake.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAlum is not required for indigo or woad vats.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWhen layering indigo with mordanted colours, apply indigo first.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAlum supports many natural dyes but cannot make a naturally fugitive colour permanent.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUsed mordant baths may retain Alum and can often be saved for reuse.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eStorage and safe handling\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eStore sealed in a cool, dry place.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAvoid creating or breathing dust.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWear eye protection when handling powder or concentrated solutions.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWear gloves where appropriate.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFor textile dyeing and craft use only.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNot for consumption or cosmetic use.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse dedicated dyeing equipment.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep away from food, children and pets.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDo not release concentrated solutions into drains or natural waterways.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eWhat you receive\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eYour chosen net weight of potassium aluminium sulphate dodecahydrate, supplied in a sealed pouch.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCream of tartar, soda ash, tannins and other dyeing materials are sold separately.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDisplay jars, dyed fibres and photographic props are not included.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eLearn with us\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eJoin \u003c\/span\u003e\u003ca href=\"https:\/\/the-natural-dyers-academy.mn.co\/\"\u003e\u003cspan\u003eThe Natural Dyers \u0026amp; Growers Academy\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e to share your results and explore natural colour alongside fellow dyers and growers.\u003c\/span\u003e\u003c\/p\u003e","brand":"AppleOak FibreWorks","offers":[{"title":"25g","offer_id":9181824188473,"sku":"greening","price":6.5,"currency_code":"EUR","in_stock":true},{"title":"50g","offer_id":9181824221241,"sku":"greening","price":6.95,"currency_code":"EUR","in_stock":true},{"title":"75g","offer_id":9181824254009,"sku":"greening","price":7.5,"currency_code":"EUR","in_stock":true},{"title":"100g","offer_id":9181824286777,"sku":"greening","price":7.95,"currency_code":"EUR","in_stock":true},{"title":"250g","offer_id":49914400670032,"sku":"greening","price":10.5,"currency_code":"EUR","in_stock":true},{"title":"500g","offer_id":39526688129078,"sku":"greening","price":15.0,"currency_code":"EUR","in_stock":true},{"title":"1kg","offer_id":39526687899702,"sku":"greening","price":24.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0098\/2918\/7641\/files\/Allum.jpg?v=1774370540","url":"https:\/\/appleoakfibreworks.com\/products\/aluminium-potassium-mordant","provider":"AppleOak FibreWorks","version":"1.0","type":"link"}