{"product_id":"calcium-carbonate","title":"Calcium Carbonate","description":"\u003cp\u003eCalcium Carbonate (also known as chalk) is a white mineral powder used in natural dyeing to adjust dye baths and enhance color development. It is especially popular with madder dyeing, where it helps produce deeper shades of reds.\u003c\/p\u003e\n\u003cp\u003eCommonly used with cotton and other cellulose fibers, Calcium Carbonate may be added directly to the madder dye bath to enrich color. It is also a naturally occurring mineral and one of the primary contributors to hard water.\u003c\/p\u003e\n\u003cp\u003eIdeal for natural dyeing, botanical dye projects, fabric dyeing, yarn dyeing, immersion dyeing, solar dyeing, and traditional textile processes.\u003c\/p\u003e\n\u003cp data-start=\"1303\" data-end=\"1547\"\u003e\u003cspan\u003eThe recommended amount of calcium carbonate is 5% WOF, approx. 1 teaspoon for 100 grams of fiber.\u003c\/span\u003e\u003c\/p\u003e","brand":"Dharma Trading INC","offers":[{"title":"4 oz","offer_id":48493245628670,"sku":null,"price":6.5,"currency_code":"USD","in_stock":true},{"title":"8 oz","offer_id":48493245661438,"sku":null,"price":10.5,"currency_code":"USD","in_stock":false},{"title":"16 oz","offer_id":48493245694206,"sku":null,"price":18.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1160\/7736\/files\/Screenshot2026-06-29at2.45.25PM.png?v=1782758732","url":"https:\/\/red-stone-glen-fiber-arts-center.myshopify.com\/products\/calcium-carbonate","provider":"Red Stone Glen Fiber Arts Center","version":"1.0","type":"link"}