Valentines V9G

Pics from autumn 2019 firing – cone 12 reached. Pot was mostly glazed, just the foot exposed. Colour may be from flashing from the wadding.

Manufacturer: Valentines

This is the more heavily grogged version of V9A. An excellent general purpose modelling clay, which contains Shropshire & South Staffordshire Fire Clays with a fine graded dust free grog. The addition of grog gives good resistance to cracking and warping. V9G behaves well under oxidising and reduction conditions.

Recommended firing range 1120 - 1280C
Applications: Throwing, modelling
Texture: 6

Composition:

SiO2	TiO2	Al2O3	Fe2O3	P2O5	CaO	MgO	K2O	Na2O	LOI
65.7	1.1	21.0	2.6	0.04	0.20	0.56	1.8	0.1	?

Shrinkage 13.4%@1200
Thermal expansion 0.242%@500C, 0.314%@600C