{"id":3786,"date":"2026-03-21T08:56:48","date_gmt":"2026-03-21T08:56:48","guid":{"rendered":"https:\/\/npk1169-001-site1.mtempurl.com\/?p=3786"},"modified":"2026-04-13T07:33:56","modified_gmt":"2026-04-13T07:33:56","slug":"mordants-fixing-colour","status":"publish","type":"post","link":"https:\/\/www.bharatwisdom.com\/hi\/physics-and-chemistry\/mordants-fixing-colour\/","title":{"rendered":"Mordants (Fixing Colour) \u2013 The Secret of Color Bonding"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1279.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p id=\"p-rc_2d99851739bfeb4f-1650\" data-path-to-node=\"52\"><span data-path-to-node=\"52,0\"><b data-path-to-node=\"52,0\" data-index-in-node=\"0\">The Concept<\/b> <\/span><span data-path-to-node=\"52,2\"><span class=\"citation-7344\">Dipping clothing in dye will cause it to wash out<\/span><\/span><span data-path-to-node=\"52,4\">. <\/span><span data-path-to-node=\"52,6\"><span class=\"citation-7343\">To chemically bond the dye to the fabric, a \u2018biter\u2019 (mordant) is required<\/span><\/span><span data-path-to-node=\"52,8\">. <\/span><span data-path-to-node=\"52,10\"><span class=\"citation-7342\">Alum is the most popular mordant<\/span><\/span><span data-path-to-node=\"52,12\">.<\/span><\/p>\n<p id=\"p-rc_2d99851739bfeb4f-1651\" data-path-to-node=\"53\"><span data-path-to-node=\"53,0\"><b data-path-to-node=\"53,0\" data-index-in-node=\"0\">The Story<\/b> <\/span><span data-path-to-node=\"53,2\"><span class=\"citation-7341\">Roman historian Pliny the Elder once marveled at Indian garments that could be washed repeatedly without losing their vivid color<\/span><\/span><span data-path-to-node=\"53,4\">. <\/span><span data-path-to-node=\"53,6\"><span class=\"citation-7340\">The secret was a &#8220;biter&#8221; called a mordant\u2014metallic salts like alum (<\/span><i data-path-to-node=\"53,6\" data-index-in-node=\"68\"><span class=\"citation-7340\">Saurashtri<\/span><\/i><span class=\"citation-7340\">) that chemically bond dye to fabric<\/span><\/span><span data-path-to-node=\"53,8\">. <\/span><span data-path-to-node=\"53,10\"><span class=\"citation-7339\">While others simply dipped cloth in pigment, Indian dyers understood the molecular bridge between fiber and color<\/span><\/span><span data-path-to-node=\"53,12\">. <\/span><span data-path-to-node=\"53,14\"><span class=\"citation-7338\">This mastery of chemical bonding made Indian textiles so popular that 17th-century England actually banned them to protect their own industries<\/span><\/span><span data-path-to-node=\"53,16\">.<\/span><\/p>\n<p data-path-to-node=\"54\"><b data-path-to-node=\"54\" data-index-in-node=\"0\">The Timeline<\/b><\/p>\n<table data-path-to-node=\"55\">\n<thead>\n<tr>\n<td><strong>Milestone<\/strong><\/td>\n<td><strong>Details<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"55,1,0,0\"><b data-path-to-node=\"55,1,0,0\" data-index-in-node=\"0\">Western Ref.<\/b><\/span><\/td>\n<td>\n<p id=\"p-rc_2d99851739bfeb4f-1652\" data-path-to-node=\"55,1,1,0\"><span data-path-to-node=\"55,1,1,0,1\"><span class=\"citation-7337\">1700s CE (Chemistry of dyeing formalized) <\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"55,2,0,0\"><b data-path-to-node=\"55,2,0,0\" data-index-in-node=\"0\">Indian Source<\/b><\/span><\/td>\n<td>\n<p id=\"p-rc_2d99851739bfeb4f-1653\" data-path-to-node=\"55,2,1,0\"><span data-path-to-node=\"55,2,1,0,0\">Prior to 2000 BCE (Mohenjo-Daro); <\/span><span data-path-to-node=\"55,2,1,0,2\"><span class=\"citation-7336\">Vedas <\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"55,3,0,0\"><b data-path-to-node=\"55,3,0,0\" data-index-in-node=\"0\">Chron. Gap<\/b><\/span><\/td>\n<td>\n<p id=\"p-rc_2d99851739bfeb4f-1654\" data-path-to-node=\"55,3,1,0\"><span data-path-to-node=\"55,3,1,0,1\"><span class=\"citation-7335\">Over 3,000 Years <\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-path-to-node=\"56\"><b data-path-to-node=\"56\" data-index-in-node=\"0\">The Original Text<\/b><\/p>\n<blockquote data-path-to-node=\"57\">\n<p id=\"p-rc_2d99851739bfeb4f-1655\" data-path-to-node=\"57,0\"><span data-path-to-node=\"57,0,0\"><b data-path-to-node=\"57,0,0\" data-index-in-node=\"0\">Sanskrit Shloka:<\/b> \u0930\u093e\u0917\u093e\u0903 \u0938\u0930\u094d\u0935\u0947 \u0938\u0938\u094c\u0930\u093e\u0937\u094d\u0924\u094d\u0930\u094d\u092f\u093e\u0903 \u092d\u0935\u0928\u094d\u0924\u093f \u0926\u094d\u092f\u0941\u0924\u093f\u092e\u0924\u094d\u0924\u092e\u093e\u0903 \u0964 <\/span><span data-path-to-node=\"57,0,2\"><span class=\"citation-7334\">\u0924\u0938\u094d\u092e\u093e\u0924\u094d \u0938\u094c\u0930\u093e\u0937\u094d\u091f\u094d\u0930\u093f\u0915\u093e\u0902 \u092f\u0941\u091e\u094d\u091c\u094d\u092f\u093e\u0924\u094d \u0930\u0919\u094d\u0917\u092c\u0928\u094d\u0927\u093e\u092f \u0935\u093e\u0938\u0938\u093e\u092e\u094d \u0965<\/span><\/span><\/p>\n<p data-path-to-node=\"57,0\"><span data-path-to-node=\"57,0,4\"> <b data-path-to-node=\"57,0,4\" data-index-in-node=\"1\">Transliteration:<\/b> R\u0101g\u0101\u1e25 sarve sasaur\u0101\u1e63try\u0101\u1e25 bhavanti dyutimattam\u0101\u1e25 | Tasm\u0101t saur\u0101\u1e63\u1e6drik\u0101\u1e43 yu\u00f1jy\u0101t ra\u1e45gabandh\u0101ya v\u0101sas\u0101m || <\/span><span data-path-to-node=\"57,0,6\"><span class=\"citation-7333\">Amarakosha (Lists types of alum and red Earths) <\/span><\/span><span data-path-to-node=\"57,0,8\">. <\/span><\/p>\n<p data-path-to-node=\"57,0\"><span data-path-to-node=\"57,0,10\"><b data-path-to-node=\"57,0,10\" data-index-in-node=\"0\"><span class=\"citation-7332\">Meaning:<\/span><\/b><span class=\"citation-7332\"> &#8220;All dyes mixed with Alum (Saurashtri) become most brilliant. Therefore, one should use Alum for the binding of color (Rangabandha) to the clothes.&#8221; <\/span><\/span><\/p>\n<div class=\"source-inline-chip-container ng-star-inserted\"><\/div>\n<\/blockquote>\n<p id=\"p-rc_2d99851739bfeb4f-1656\" data-path-to-node=\"58\"><span data-path-to-node=\"58,0\"><b data-path-to-node=\"58,0\" data-index-in-node=\"0\">Related Innovations<\/b> <\/span><span data-path-to-node=\"58,2\"><span class=\"citation-7331\">The <\/span><i data-path-to-node=\"58,2\" data-index-in-node=\"4\"><span class=\"citation-7331\">Brihat Samhita<\/span><\/i><span class=\"citation-7331\"> (about 550 CE) and the Atharva Veda mention \u2018colour binders\u2019 (<\/span><i data-path-to-node=\"58,2\" data-index-in-node=\"81\"><span class=\"citation-7331\">Rangabandhana<\/span><\/i><span class=\"citation-7331\">) such as Lodhra bark and Alum (<\/span><i data-path-to-node=\"58,2\" data-index-in-node=\"126\"><span class=\"citation-7331\">Saurashtri<\/span><\/i><span class=\"citation-7331\">)<\/span><\/span><span data-path-to-node=\"58,4\">. <\/span><span data-path-to-node=\"58,6\"><span class=\"citation-7330\">They explain why these mordants are necessary to make vegetable dyes persistent on cotton fibres<\/span><\/span><span data-path-to-node=\"58,8\">.<\/span><\/p>\n<p id=\"p-rc_2d99851739bfeb4f-1657\" data-path-to-node=\"59\"><span data-path-to-node=\"59,0\"><b data-path-to-node=\"59,0\" data-index-in-node=\"0\">Fun Fact<\/b> <\/span><span data-path-to-node=\"59,2\"><span class=\"citation-7329\">France and England restricted printed cotton textiles from India (Chintz) in the 17th century due to their popularity in Europe<\/span><\/span><span data-path-to-node=\"59,4\">. <\/span><span data-path-to-node=\"59,6\"><span class=\"citation-7328\">They wished to defend their own wool enterprises<\/span><\/span><span data-path-to-node=\"59,8\">.<\/span><\/p>\n<p id=\"p-rc_2d99851739bfeb4f-1658\" data-path-to-node=\"60\"><span data-path-to-node=\"60,0\"><b data-path-to-node=\"60,0\" data-index-in-node=\"0\">The Modern Legacy<\/b> <\/span><span data-path-to-node=\"60,2\"><span class=\"citation-7327\">Understanding chemical bonding is crucial to the polymer and plastics industries<\/span><\/span><span data-path-to-node=\"60,4\">.<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":3571,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76],"tags":[306,305,204,304,303,278],"class_list":["post-3786","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physics-and-chemistry","tag-alum","tag-amarakosha","tag-chemistry","tag-dyeing","tag-mordants","tag-textiles"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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