{"product_id":"pintura-acrilica-sombra-natural-500-ml-bellas-artes-1","title":"Pintura Acrílica Natural Sienna 500 ml - Fine Arts","description":"\u003cb\u003eColour:\u003c\/b\u003e Natural Shadow \u003cbr\u003e\u003cb\u003eLightfastness:\u003c\/b\u003e AA \u003cbr\u003e\u003cb\u003eOpacity:\u003c\/b\u003e Opaque \u003cbr\u003e\u003cb\u003ePigment:\u003c\/b\u003e PY42, PR101, PBk7 \u003cbr\u003e\u003cb\u003ePigment Description:\u003c\/b\u003e Synthetic Iron Oxide, Synthetic Red Iron Oxide, Nearly Pure Amorphous Carbon \u003cbr\u003e\u003cb\u003eASTM Lightfastness Rating:\u003c\/b\u003e - \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. The inorganic pigments have been used since ancient times and most are derived or extracted from minerals and clays, such as natural earths, siennas, and ochres. Titanium pigments, carbon, ultramarine blue, cobalt, and cadmium also belong to this category. Many of these are now synthesised through industrial processes. Organic pigments are more modern, developed in the early 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, covering azo pigments, phthalocyanine blues and greens, dioxazines, pyrroles, anthraquinones, quinacridones, and more.","brand":"Vallejo Colors","offers":[{"title":"Default Title","offer_id":61428504461642,"sku":"23017","price":20.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/0963\/2330\/files\/vallejo-studio-acrylic-500ml-17.jpg?v=1774444823","url":"https:\/\/vallejocolors.com\/en\/products\/pintura-acrilica-sombra-natural-500-ml-bellas-artes-1","provider":"Vallejo Colors","version":"1.0","type":"link"}