Shree Trading Company

Yellow Ocher

Business Type Manufacturer, Supplier, Retailer, Wholesaler
Color Yellow
Chemical Name Iron Oxide Hydroxide
Chemical Formula α-FeOOH
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Product Details

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STC has been in Various Mineral & Metals business as a family concern since 1998.  The Company has acquired 5 mining leases in various District of Gujarat State, India, having total area of about 45 hectares, over & above 36 hectares being possessed in name of its associated company as well a fresh application for about 20 hectares to Govt. during 2001.

Minerals Lease :  Bauxite,  Red Ocher,  Yellow Ocher,  Lime Stone  And Natural Gypsum

Yellow Ocher other name is Goethite, limonite, raw sienna, yellow earth, yellow iron oxide, yellow hydrated oxide and iron hydroxide pigment, The main color giving component of natural yellow ochre (ocher, yellow earth) is limonite which is not a single mineral but a mixture of several iron-containing minerals among them goethite, akageneite, lepidocrocite, and jarosite, goethite (iron oxide hydroxide α-FeOOH) being the main component.

Iron oxides are stable at high temperatures but not resistant against acids. The pigment is absolutely stable as is documented by the cave paintings still in excellent condition after many thousands of years. It is compatible with all other pigments and is often used in mixture with other paints.

Paint & Pharmaceutical Industries

  • This ocher is mainly used in paint and pharma industries suitable for producing chinaware, porcelain, and refractories.
  • These character of Yellow Ocher is necessary to obtain the necessary properties of plasticity, shrinkage, vitrification for forming and firing the ware.

Oil Absorption and Grinding
Ocher absorbs a moderately high amount of oil. The oil absorption ratio is 30–35 parts by weight of linseed oil to 100 parts by weight of pigment. If the measurement were grams, this pigment would require 30-35 grams of pigment to grind 100 grams of linseed oil to form a stiff paste. It slows the drying of oil paint, but forms a good film.

Other Uses

  • Pharmaceuticals   
  • Sanitary wares   
  • Ceramics & Tiles
  • Paints & pigments  
  • Adhesives and sealant chemicals
  • Rubber   
  • Fertilizers    
  • Viscosity adjustors
  • Organic farming   
  • Mortar   
  • Fuels and Fuel additives

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Technical Specification

Chemical Composition Unit Result Protocol
Silica As SiO2 % 16 to 21 IS : 2000:P-2:1985
  Magnesium Oxide As MgO % 2 to 25 IS : 5949 : 1990
Calcium Oxide As CaO % 27 to 32 IS : 5949 : 1990
  Iron Oxide As Fe2O3 % 11 to 18 IS : 2840 : 2002
Alumina Oxide As Al2O3 % 10 to 15 IS : 2840 : 2002
  Sodium As Na2O % 0.01 to 0.20 IS : 9497 : 1980
Potassium As K2O % 0.25 to 1.15 IS : 9497 : 1980
  Loss of Ignition % 25 to 28 IS : 2840:2002
Sizes % 0-200mm & 100 + mesh  

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