{"product_id":"gris-payne-2","title":"Payne's Grey","description":"\u003cb\u003eColour:\u003c\/b\u003e Payne's Grey\u003cbr\u003e\u003cb\u003eLightfastness:\u003c\/b\u003e AA\u003cbr\u003e\u003cb\u003eOpacity:\u003c\/b\u003e Opaque\u003cbr\u003e\u003cb\u003ePigment:\u003c\/b\u003e PB29, PBk11, PY42\u003cbr\u003e\u003cb\u003ePigment description:\u003c\/b\u003e Sodium Sulphosilicate of Aluminium, Synthetic Black Iron Oxide, Synthetic Iron Oxide\u003cbr\u003e\u003cb\u003eASTM Lightfastness classification:\u003c\/b\u003e I\u003cbr\u003e\u003cb\u003ePigment classification:\u003c\/b\u003e Mixture\u003cbr\u003e\u003cb\u003eColour Index Number:\u003c\/b\u003e -\u003cbr\u003e\u003cb\u003eViscosity range (mPa.s):\u003c\/b\u003e 15,000 - 20,000\u003cbr\u003e\u003cbr\u003e\u003cb\u003eColour Index\u003c\/b\u003e\u003cbr\u003eThe pigments used are both inorganic and organic. Inorganic pigments have been used since antiquity and the great majority come from or are extracted from minerals and clays, such as natural earths, siennas, and ochres. Titanium, carbon, ultramarine blue, cobalt and cadmium pigments also belong to this category. Many of them are currently synthesised in industrial processes. Organic pigments are more modern, developed at the beginning of the 20th century thanks to new synthesis methods in Organic Chemistry. These synthetic pigments are now a very important group in the manufacture of colours for artists, producing bright and luminous tones with extraordinary intensity and excellent stability and permanence. The range of organic pigments is currently very extensive and includes azo pigments, blues, green phthalocyanines, dioxazines, pyrroles, anthraquinones, quinacridones, etc.","brand":"Vallejo Colors","offers":[{"title":"Default Title","offer_id":64141514834250,"sku":"22050","price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/0963\/2330\/files\/vallejo-studio-acrylic-200ml-50.jpg?v=1793260667","url":"https:\/\/vallejocolors.com\/en\/products\/gris-payne-2","provider":"Vallejo Colors","version":"1.0","type":"link"}