{"product_id":"mars-red-transparent","title":"Mars red transparent","description":"\u003cp\u003e\u003cstrong\u003eMars red transparent\u003c\/strong\u003e is a synthetic red iron oxide pigment powder (PR101) made of extremely fine particles, so it glazes instead of covering. It gives a clear, warm rust red in thin layers and is used for glazes, transparent shadows and warm underlayers in oil and acrylic, and for watercolor washes.\u003c\/p\u003e\u003ch2\u003eKey facts\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e warm rust red\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePigment type:\u003c\/strong\u003e Synthetic inorganic pigment (transparent iron oxide)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour Index:\u003c\/strong\u003e PR101 (C.I. 77491)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e iron(III) oxide, Fe\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e, as nanometer-size particles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e synthetic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso known as:\u003c\/strong\u003e transparent red iron oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpacity:\u003c\/strong\u003e transparent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightfastness:\u003c\/strong\u003e 8 of 8 on the Blue Wool Scale (supplier data)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical resistance:\u003c\/strong\u003e alkali 5\/5, lime 5\/5 (supplier data, 5 = best); stable in weak acids, dissolved by strong mineral acids\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e oil, acrylic, egg tempera, watercolor, gouache, fresco (lime), lime and cement plaster, ceramics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e 50 g jar · 1 kg bag\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow to use\u003c\/h2\u003e\u003cp\u003eTransparent iron oxides are hard to disperse, because the tiny particles cling together in clusters. Mull the powder thoroughly with a glass muller, adding linseed oil, acrylic medium or gum arabic little by little, until the paint is smooth and free of specks. Apply it thinly over a light ground or a dry underpainting, and build depth with several glazes rather than one thick layer.\u003c\/p\u003e\u003ch2\u003eAbout Mars red transparent\u003c\/h2\u003e\u003cp\u003eIron oxides become transparent when their particles are smaller than about 0.1 µm: such tiny needles, typically under 20 nm wide and 150 nm long, no longer scatter light. Transparent red is commonly made by heating transparent yellow iron oxide. Chemically it is the same Fe\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e as opaque Mars red; industry uses it in wood finishes and car paints, where it also absorbs UV light.\u003c\/p\u003e\u003ch2\u003eSafety\u003c\/h2\u003e\u003cp\u003eHandle dry pigment with care: avoid breathing the dust and contact with eyes. Wear a dust mask (FFP2\/N95) and gloves when working with the powder, work in a well-ventilated area and wipe up spills with a damp cloth. Do not eat, drink or smoke while working; wash your hands afterwards. Keep away from children and pets. For artistic and technical use only — not for cosmetics, food or tattoos.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWhat makes it transparent?\u003c\/h3\u003e\u003cp\u003eParticle size. Its particles are far smaller than those of ordinary iron oxide, so they let light pass instead of scattering it. The chemistry is the same as in opaque red iron oxide.\u003c\/p\u003e\u003ch3\u003eHow is it different from Hematite and Venetian red?\u003c\/h3\u003e\u003cp\u003eAll three are synthetic red iron oxide, PR101. Hematite and Venetian red are opaque grades for covering; Mars red transparent is made for glazing.\u003c\/p\u003e\u003ch3\u003eIs it lightfast?\u003c\/h3\u003e\u003cp\u003eYes. The supplier rates it 8 of 8 on the Blue Wool Scale, and transparent iron oxides are known for excellent permanence.\u003c\/p\u003e","brand":"COLIBRI PIGMENTS LLC","offers":[{"title":"50g","offer_id":51694609629431,"sku":null,"price":12.9,"currency_code":"USD","in_stock":true},{"title":"1kg","offer_id":51696517054711,"sku":null,"price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/6696\/9079\/files\/mars-red-transparent.jpg?v=1793370317","url":"https:\/\/colibripigments.com\/products\/mars-red-transparent","provider":"Colibri Pigments","version":"1.0","type":"link"}