Talc

Talc (silicate, chemical formula Mg₃(OH)₂/Si₄O₁₀) can be characterised by:

 

• Lamellar nature: talc can be classified as either microcrystalline (length:thickness = 10:1) or macrocrystalline (length:thickness = 35:1)
• Low Mohs hardness of 1 (being the softest mineral in the range)
• Hydrophobic surface and resulting low water absorption
• High brightness
• High purity
• High inertness in various media.

 

Basic properties

Property	Value	Unit
Moisture	0.2	[%]
pH	9	[-]
Hardness (Mohs)	1	[-]
Refractive index	1.57	[-]
Density	2.8	[kg/ dm3]

 

Product overview

Product	Grade	D50 [µm]	D97 [µm]	OA [g/ 100 g]	L*
Tital	VT 5	4.5	11	55	96
	VT 10	7	17	52	96
	VT 15	8	22	52	96
	VT 20	10	28	48	96
	VT 30	15.5	60	40	96
	VT 50	16	72	32	96
	VT Prime	10	28	38	93

Production location Tital

 

Application

Talc will provide:

 

• Mud cracking resistance: due to its lamellar structure, talc will mechanically reinforce the binder matrix and hence lower the tendency for mud cracking to occur.
• Wet scrub resistance: due to its low hardness of 1 on the Mohs scale and hydrophobic nature, talc will improve the wet-scrub resistance of interior decorative coatings.