{"id":3970,"date":"2014-11-24T10:27:33","date_gmt":"2014-11-24T09:27:33","guid":{"rendered":"http:\/\/www.green-ingredients.com\/?post_type=product&p=3970&lang=en"},"modified":"2025-12-09T18:04:28","modified_gmt":"2025-12-09T17:04:28","slug":"alum-potassium-alum","status":"publish","type":"product","link":"https:\/\/www.green-ingredients.com\/en\/product\/alum-potassium-alum\/","title":{"rendered":"Alum – Potassium Alum"},"content":{"rendered":"

Alum – Potassium Alum –\u00a0<\/span>Potassium aluminum sulfate<\/span>\u00a0<\/span>dodecahydrate<\/strong><\/p>\n

Use :
\n<\/span><\/strong>Natural dyeing – mordanting any fibers<\/span>\u00a0<\/span>:\u00a0<\/span>potassium aluminum is the easiest and most popular mordant used with natural colours. It does not change the shades<\/span>\u00a0<\/span>and is necessary for a good fixation of the natural colours.<\/span><\/p>\n

For protein fibers<\/strong>\u00a0<\/span>(wool or silk), we recommend to use the alum associated with\u00a0<\/span>cream of tartar<\/a>\u00a0<\/span>that improves the fixation of alum to the fiber.<\/span><\/span>
\nFor cellulosic fibers<\/strong>\u00a0<\/span>(cotton, linen, hemp, abaca…), we recommend to use alum in association with\u00a0<\/span>sodium carbonate<\/a>. If you prefer to use a single product, you can also select\u00a0<\/span>aluminum acetate<\/a>\u00a0<\/span>instead of alum.<\/span><\/span><\/p>\n

Also, combinations of aluminum and iron mordants or a last (very light) iron bath after a aluminum-mordanted-colour will widely increase the number of shades.<\/span><\/span><\/p>\n

Natural inks<\/span>\u00a0<\/span>: potassium alum both contributes to stabilize the natural dyes molecules (by complexation) and to better develop their colour. Our\u00a0<\/span>plant dye extracts<\/a>\u00a0<\/span>can be used for the preparation of natural inks, for instance in combination with arabic gum. Alum has also bacteriostatic properties on certain bacteria and plays a role on the preservation of products.<\/span><\/span><\/p>\n

Natural paints and coatings<\/span>\u00a0<\/span>: in lime coatings, a small proportion of alum accelerates the crystallization and\u00a0 hardening. It also allows to fix pigments and to deepen colours in milks, paints or lime mortars. It hardens plasters and clays.<\/span><\/span>
\n
Other uses (for instance)<\/span>\u00a0<\/span>: treatment of leathers and tanning.<\/p>\n

Products not intended for food.<\/span><\/span><\/span><\/p>\n

\"\"Go back to <\/span>Ingredients, mordants & additives<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Alum – Potassium Alum –\u00a0Potassium aluminum sulfate\u00a0dodecahydrate Use : Natural dyeing – mordanting any fibers\u00a0:\u00a0potassium aluminum is the easiest and most popular mordant used with natural colours. It does not change the shades\u00a0and is necessary for a good fixation of the natural colours. For protein fibers\u00a0(wool or silk), we recommend to use the alum associated […]<\/p>\n","protected":false},"featured_media":10825,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[67],"product_tag":[160],"class_list":{"0":"post-3970","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ingredients","7":"product_tag-mordancage-en","8":"pa_poids-1-kg-en","9":"pa_poids-500-g-en","11":"first","12":"instock","13":"taxable","14":"shipping-taxable","15":"purchasable","16":"product-type-variable","17":"has-default-attributes"},"_links":{"self":[{"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/product\/3970","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/media\/10825"}],"wp:attachment":[{"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/media?parent=3970"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/product_brand?post=3970"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/product_cat?post=3970"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.green-ingredients.com\/en\/wp-json\/wp\/v2\/product_tag?post=3970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}