{"id":26471,"date":"2026-09-28T16:58:34","date_gmt":"2026-09-28T13:58:34","guid":{"rendered":"https:\/\/artrestorationsupplies.gr\/?post_type=product&#038;p=26471"},"modified":"2026-09-28T17:07:22","modified_gmt":"2026-09-28T14:07:22","slug":"kremer-tannin-%cf%84%ce%b1%ce%bd%ce%bd%ce%b9%ce%ba%cf%8c-%ce%bf%ce%be%cf%8d-tannic-acid","status":"publish","type":"product","link":"https:\/\/artrestorationsupplies.gr\/en\/product\/kremer-tannin-%cf%84%ce%b1%ce%bd%ce%bd%ce%b9%ce%ba%cf%8c-%ce%bf%ce%be%cf%8d-tannic-acid\/","title":{"rendered":"Kremer Tannin \u2013 Tannic Acid"},"content":{"rendered":"<p>Tannic acid (gallotannin, CAS 1401-55-4) from Kremer Pigmente, as a light brown powder. It is a natural polyphenol that forms stable dark complexes with iron ions (iron tannate).<\/p>\n<ul>\n<li><strong>Solubility:<\/strong> very good in water and ethanol; minimal in non-polar solvents<\/li>\n<li><strong>Uses in conservation:<\/strong> corrosion inhibitor\/rust converter on iron (usually 5\u201320% in water or ethanol, with or without phosphoric acid), temporary stabilisation of archaeological iron; a component of iron-gall inks and plant dyes<\/li>\n<li>When applied to iron, subsequent protection with wax or acrylic resin is recommended<\/li>\n<li>Manufacturer\/supplier: Kremer Pigmente GmbH &amp; Co. KG (Germany)<\/li>\n<\/ul>\n<p><strong>Safety:<\/strong> Eye irritant; avoid inhaling the dust. Safety data sheet (SDS) available on request.<\/p>\n<p class=\"ars-imp\"><strong>Made to order \u00b7 imported from abroad.<\/strong> This product is ordered from the manufacturer. Import shipping costs may be added to the price; we confirm them by email before payment.<\/p>","protected":false},"excerpt":{"rendered":"<p>Tannic acid (tannin) for stabilising rust and inhibiting corrosion of iron objects, and for traditional inks and dyes.<\/p>","protected":false},"featured_media":26475,"template":"","meta":[],"product_brand":[1295],"product_cat":[1084,1082],"product_tag":[],"class_list":["post-26471","product","type-product","status-publish","has-post-thumbnail","product_brand-kremer-pigmente","product_cat-1084","product_cat-1082","first","onbackorder","taxable","shipping-taxable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/26471","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":1,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/26471\/revisions"}],"predecessor-version":[{"id":26726,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/26471\/revisions\/26726"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/media\/26475"}],"wp:attachment":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/media?parent=26471"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_brand?post=26471"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_cat?post=26471"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_tag?post=26471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}