Glacier 200 Talc

Alternate Names: Cyprus Glacier 200 Talc

Description: Montana Talc

Oxide	Analysis	Formula
CaO	2.00%	0.05
MgO	30.00%	0.95
Al2O3	0.50%	0.01
SiO2	60.00%	1.28
Fe2O3	1.00%	0.01
CO2	2.50%	n/a
H2O	4.00%	n/a
Oxide Weight		119.86
Formula Weight		128.19

Notes

Glacier 200 platy talc is the filler or extender of choice in dark-colored paints and primers, and for many other applications without high brightness requirements. Cyprus offers Glacier 200 at a substantial cost savings compared with higher brightness talcs.

Mineral Analysis:
Talc: 94%
Dolomite: 2%
Calcite: 2%
Quartz: 2%
Asbestos Minerals: not detected

Oil Absorption, g/100g talc:
Spatula rub-out, ASTM D281 - 28
Gardner-Coleman, ASTM D1483 - 38
Apparent Density, lb/ft3:
Loose (Scott Volumeter) - 28
Tapped (Numinco) - 61
Surface Area, m2/g (N2, BET) - 9
Hegman Fineness of Grind: 1.5-2.5
Adsorbed Moisture, %: .2
pH (1:5 dilution): 9
Refractive Index: 1.6
Specific Gravity: 2.8

Particle Size:
Minus 200 mesh, 74 micron: 99.6-99.8%
-325 mesh, 44 micron: 96%
-20 micron: 84%
-10 micron: 57%
-5 micron: 36%
-2 micron: 18%
-1 micron: 10%
Median Particle Size, micron: 8

Related Information

Links

Materials	Talc A source of MgO for ceramic glazes, a flux or thermal expansion additive in clay bodies, also used in the manufacture of cordierite.
Typecodes	Flux Source Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
Hazards	Talc Hazards Overview Talc is invaluable in the ceramics industry, it is used as a glaze and body ingredient and as a parting a release agent in various processes. Is it safe?

By Tony Hansen
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