{"product_id":"rohrer-klingner-salix-iron-gall-ink","title":"Rohrer \u0026 Klingner Salix — Iron Gall Ink","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat iron gall ink does that other inks don't\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eIron gall inks work differently to dye inks and pigment inks. When the ink first touches the paper it reads as a blue-periwinkle. Over the following hours it oxidises — the iron compounds in the formulation react with air and the paper surface — and deepens into a dusky blue-black. The line you made this morning looks different this afternoon. Lines made weeks ago look different again.*\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e*For illustration this is not a problem — it is a quality. The slight variation in tone across a drawing made over several sessions creates a natural depth that a uniform black cannot replicate. Iron gall also produces excellent water resistance as it oxidises, making older lines more durable than fresh ones.\u003c\/p\u003e","brand":"Rohrer \u0026 Klingner Salix","offers":[{"title":"Default Title","offer_id":53225222078792,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":false}],"url":"https:\/\/inkwellartsupplies.com\/products\/rohrer-klingner-salix-iron-gall-ink","provider":"Inkwell Art Supplies","version":"1.0","type":"link"}