Photoconductor Charging Uniformity Correction

Examples of charging a photoconductive layer in an image forming apparatus are described. In one example, a method comprises applying a charging voltage to the photoconductive layer and measuring surface voltages of the photoconductive layer at a plurality of positions on the photoconductive layer. Based on the measured surface voltages, a correction voltage profile is determined. The determined correction voltage profile comprises at least a first correction voltage associated with a first position on the photoconductive layer and a second correction voltage associated with a second position, different to the first position, on the photoconductive layer. The method comprises applying the first correction voltage to the photoconductive layer and applying the second correction voltage to the photoconductive layer.