{"product_id":"jacquard-alum","title":"Alum","description":"\u003cp\u003eAluminum sulfate crystals dissolve into solution for two essential fabric preparation tasks. As a pre-treatment before marbling, alum creates a receptive surface that grabs floating pigments cleanly, designs transfer with crisp edges rather than muddy bleeding. The crystals dissolve readily in warm water, and a quick soak ensures even saturation across your fabric or paper.\u003c\/p\u003e\n\u003cp\u003eNatural dyers know alum as the gentlest, most versatile mordant for protein fibers. It bonds dye molecules to wool and silk without harsh chemistry or fiber damage, creating wash-fast colors from plant materials that would otherwise rinse away. Cochineal reds, madder oranges, and weld yellows all achieve their brightest, most permanent results when fiber is properly alum-mordanted first. The metallic compound forms stable lakes within the fiber structure, chemical bonds that withstand repeated washing.\u003c\/p\u003e\n\u003cp\u003eMix approximately 15% weight-of-fabric for dyeing, or follow specific marbling ratios for surface preparation. One container handles multiple projects, whether you're setting up marbling trays or preparing yarn skeins for botanical dyeing. Store the dry crystals sealed between uses to prevent moisture absorption.\u003c\/p\u003e","brand":"Jacquard","offers":[{"title":"1 lb.","offer_id":48102320799973,"sku":"97366","price":11.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6890\/5701\/files\/s97366.jpg?v=1768584586","url":"https:\/\/www.texasart.com\/products\/jacquard-alum","provider":"Texas Art Supply","version":"1.0","type":"link"}