Experimental measurements are reported on the quantity of charge received and the associated initial surface voltage for a variety of materials. For a number of materials the surface voltage increases roughly in proportion to the charge received and the effective capacitance for this charge remains fairly steady. For fabrics with embedded conductive threads the initial surface voltage increases towards a plateau value and this may range from around 200 V up to perhaps 1500 V. The capacitance for the received charge increases roughly in proportion to the charge received.