{"product_id":"mordant-ferrous-sulphate","title":"Mordant - Ferrous Sulphate","description":"\u003cp\u003e\u003cstrong\u003eIron Sulphate\u003c\/strong\u003e, also known as \u003cstrong\u003eFerrous Sulphate\u003c\/strong\u003e, is a traditional mordant and colour modifier used in natural dyeing to darken and shift colours. Often referred to as a way to “sadden” colours, it transforms bright shades into deeper greys, soft blacks and muted earthy tones.\u003c\/p\u003e\n\u003cp\u003eUsed either during or after dyeing, iron can significantly alter the final colour, adding depth, contrast and a more aged or rustic appearance. It can also help improve lightfastness in some natural dyes, making it a valuable addition to the dyeing process. This finely milled powder dissolves easily in water, ensuring consistent and reliable results across a range of dyeing techniques. While suitable for use on all natural fibres, it should be used with care on protein fibres such as wool and silk, as overuse can lead to a harsher handle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDarkens and modifies natural dye colours\u003c\/li\u003e\n\u003cli\u003eProduces greys, blacks and muted earthy tones\u003c\/li\u003e\n\u003cli\u003eEnhances depth and character in dyed fibres\u003c\/li\u003e\n\u003cli\u003eCan improve lightfastness in some dye processes\u003c\/li\u003e\n\u003cli\u003eFinely milled for easy dissolving and consistent results\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOver-dyeing and natural colour modification\u003c\/li\u003e\n\u003cli\u003eWool, silk, cotton and linen projects needing muted tones\u003c\/li\u003e\n\u003cli\u003eTextile studios, artisans and botanical dye workshops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePure ferrous sulphate mordant for colour deepening\u003c\/li\u003e\n\u003cli\u003eEnhances wash and lightfastness of natural dyes\u003c\/li\u003e\n\u003cli\u003eProduces greys, charcoals, and aged tones\u003c\/li\u003e\n\u003cli\u003eUse 1–2% of fabric weight for post-mordant or modifier baths\u003c\/li\u003e\n\u003cli\u003eWear gloves and avoid metal contact with solution\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kraftkolour","offers":[{"title":"Default Title","offer_id":51912859877640,"sku":"L.ND.FERSUL","price":5.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2345\/3704\/files\/mordant.ferrouossulphate1.jpg?v=1773836085","url":"https:\/\/winghamwoolwork.co.uk\/products\/mordant-ferrous-sulphate","provider":"Wingham Wool","version":"1.0","type":"link"}