Talc

Talc

Talc is a hydrated magnesium silicate. Talc is our planet’s softest known mineral. All talcs are lamellar, chemically inert, organophilic and water repellent, but no two talcs are the same. Their unique properties bring added performance to a wide range of products and processes.

talc

Talc Specifications

Talc (Soap Stone) Powder Specifications
Particulars Units Pure White Super White White Test Methods
Brightness % 97 95 91+-1 As Standard
Loss on Ignition % 5 to 7 5 to 7 6 to 7
Acid Soluble % 4.9 4.9 4.9
Oil Absorption gm/100 gm 41-45 41-45 43-45
Residue Mesh 500-700 500-700 500-700
Moisture % 0.1 0.1 0.2
pH - 7 to 8 7 to 8 8.5 to 9.5
SiO2 % 59 59 58-59
MgO % 31 to 34 31 to 34 30-34
Al2O3 % 0.1-0.3 0.1-0.3 0.1
Fe2O3 % 0.1-0.45 0.1-0.45 0.45
CaO % 0.3-0.6 0.3-0.6 0.5
K2O % traces traces traces
Na2O % traces traces traces
Talc (Soap Stone) Lumps Specifications
Particulars Units Pure White Super White White Test Methods
Brightness % 97 95 91+-1 As Standard
Loss on Ignition % 5 to 7 5 to 7 6 to 7
Acid Soluble % 4.9 4.9 4.9
Oil Absorption gm/100 gm 41-45 41-45 43-45
pH - 7 to 8 7 to 8 8.5 to 9.5
SiO2 % 59 59 58-59
MgO % 31 to 34 31 to 34 30-34
Al2O3 % 0.1-0.3 0.1-0.3 0.1
Fe2O3 % 0.1-0.45 0.1-0.45 0.45
CaO % 0.3-0.6 0.3-0.6 0.5
K2O % traces traces traces
Na2O % traces traces traces

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