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Products ‣ Talc

Introduction

Talc Mg3Si4O10(OH)2 the name has been in use since antiquity and is derived from the Arabic. Talc is a highly lamellar product. It is suitable for applications where very fine, pure and bright product is required.




History

Talc, a hydrous silicate of magnesium, crystallizes in the monoclinic system. It ranges in color from white to greenish gray or dark green. It occurs as flakes. The specific gravity ranges from 2.6 to 2.8. It has a greasy feel and a hardness of 1 to 1.5. The most common impurities are dolomite, calcite, quartz and serpentine.



Properties

The properties of Talc which make it of commercial value are;

» Extreme Softness
» Moderate Lustre
» Lubrication Properties
» Low Moisture Content
» Ability to absorb Oil and Grease
» Chemical Inertness
» High Fusion Point
» Low Conductivity for Heat and Electricity
» Good Hiding Power as a pigment


Application

» Paints
» Plastics & Compounding
» Ceramics
» Paper
» Cosmetics
» Pharmaceuticals
» Other Uses: Cereal Polishing, Bleaching Agent, Floor Wax, Water Filtration, Leather Treatment, Shoe Polish, Welding Rod Coating, Printing Ink, Casting for Iron Ore in the direct reduction process, Asphalt, Jointing Compounds, Confectioneries, Foam / Rubber, Putties, Chewing Gum, Animal Feed, Lubricants, Soaps Manufacturing


Grades

1st Grade Quality


Mining Starts
Several Years
Mining Location
2000 Km away from Karachi Port
Size
100% Lumps 20 – 200 mm (+, - 5% Fine 0 – 6 mm)
Whiteness
at Ry 92 – 94% at L* 97 – 98%
Color
White, Light Green & Light Grey
Monthly Production
Thousands of Tons
Reserves
Millions of Tons
Environmental Disability
May – July 30% less production due to rainy season, Dec – Feb 50% less production due to snow falling


2nd Grade Quality


Mining Starts
Several years
Mining Location
2000 Km away from Karachi Port
Size
40% Lumps 20 – 200mm, 30% Chips 6 – 20 mm, 30% Fine 0 – 6 mm
Whiteness
at Ry 90 – 92% at L* 96 – 97%
Color
White, Light Green & Light Grey
Monthly Production
Thousands of Tons
Reserves
Millions of Tons
Environmental Disability
May – July 30% less production due to rainy season, Dec – Feb 50% less production due to snow falling


3rd Grade Quality


Mining Starts
Several years
Mining Location
1500 Km away from Karachi Port
Size
100% 0 – 6 mm
Whiteness
at Ry 87 – 89% at L* 95 – 96%
Color
White, Light Green & Light Grey
Monthly Production
Thousands of Tons
Reserves
Millions of Tons
Environmental Disability
May – July 30% less production due to rainy season, Dec – Feb 50% less production due to snow falling


Talc ‘B’ Grade


Mining Starts
Several years
Mining Location
300 Km away from Karachi Port
Size
0 – 600 mm
Whiteness
at Ry 72 – 75% at L* 89 – 91%
Color
Light Green, Light Grey, Dark Grey & Dark Green
Monthly Production
Thousands of Tons
Reserves
Millions of Tons
Environmental Disability
May – July 30% less production due to rainy season