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Powder Technology -> Test Results Different Grades -> A Grade CTA25
     
 
| Butter Grade CTAA25 | Butter Grade CTAA30 | Butter Grade CTAA40 | A Grade CTA30 | A Grade CTA40 | Silver Grade CTS25 |
| Silver Grade CTS30 | Silver Grade CTS40 | Softer Grade CTSF25 | Softer Grade CTSF30 | Softer Grade CTSF40 |
 
 
DESCRIPTION
 
Talc is a highly lamellar product. It is suitable for applications where very fine, pure and bright product is required.
 
MINERALOGY
 
Parameters Formula Method Unit Result
Lead Pb X - Ray Fluorescence % Traces
Chlorite Cl X - Ray Fluorescence % Traces
Arsenic Ar X - Ray Fluorescence % Traces
Chromium Cr X - Ray Fluorescence % Traces
Manganese Mg X - Ray Fluorescence % Traces
Nickel Ni X - Ray Fluorescence % Traces
 
Detection of Asbestiform Minerals by DTFA J4 - 1 Method Parameters
Detection of Amphibole Minerals as Asbestos by XRD Negative
 
AVERAGE ANALYSIS BY SGS MINLAB - 939 / 2014
 
Chemical Analysis
 
Parameters Formula Method Unit Result
Silica SiO2 Based on Scott ( Gravimetric ) % 56.35
Magnesium Oxide MgO Based on Scott ( Titrimetric ) % 32.07
Calcium Oxide CaO Based on Scott ( Titrimetric ) % 00.97
Calcium Carbonate CaCO3 Calculated % 01.73
Loss on Ignition ( L.O.I ) at 1050 °C     7 - 8
 
Physical Analysis
 
Parameters Method Result
Density ISO 787/10 2.75 g/ml
Bulk Density ISO 787/11 0.70 g/ml
Hardness Mohs 1
Refractive Index   1.75
pH ISO 787/9 8
Moisture ISO 782/2 < 1 %
Whiteness Ry 91 - 93%
Whiteness L* 96 - 97%
 
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
 
PSD SEDIGRAPH
 
Sample Talc Powder CTA25 R.I.Re. 1.55 R.I.Im. 0
Medium Water Medium R.I. 1.333 Obscuration 27.88 %
Dispersant N/A Modal Unimodal Residua 0.274 %
Remarks Aimsizer
Median (D50) 10.49 um VMD(4,3) 10.97 um SMD(3,2) 8.05 um
SSA 745.02 m2 / m3 Uniformity 0.39 Span 1.27
D10 4.63 um D16 5.75 um D25 7.14 um
D75 14.28 um D84 16.2 um D90 17.97 um
D97 21.65 um D98 23.01 um