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Oxide Analysis Formula
CaO 0.30% 0.01
MgO 32.00% 0.99
Al2O3 1.60% 0.02
SiO2 60.00% 1.25
Fe2O3 1.80% 0.01
Oxide Weight 119.72
Formula Weight 126.68


Talcron products are intended for use as a general purpose talc filler in caulking compounds, automotive sound deadeners, auto-body putty, anti-caking agents in fertilizer, construction chalk line powder, and other miscellaneous end uses where color is of secondary importance and an economical source of talc is desired. There are no detectable quantities of asbestiform minerals.

When used in ceramics, tests should be done to be sure that the iron content does not darken the mix more than can be tolerated.

Properties: MP MP MP
50-26 70-22 99-10
Median Particle
Size (microns): 6 8 15

Dry Brightness
(Hunter Y, Rd value): 84 83 82

Bulk Density (gms/cc): 0.46 0.48 0.54
Tap Density (gms/cc): 0.80 0.87 1.22

on 325 mesh screen: 1.8
on 200 mesh: 2.0
on 100 mesh: 5.0

pH: 8.8
Specific Gravity: 2.8

Related Information


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.
Materials Talc

By Tony Hansen

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