The present invention relates to a process for dyeing keratin fibres in which a mixture is applied to the fibres, this mixture being obtained from: &mdasha dye composition comprising at least one oxidation dye precursor, and &mdashanoxidizing composition comprising at least one chemical oxidizing agent, &mdashat least one of the compositions being dispensed from a pressurized container, &mdashthe mixture of the two compositions comprising at least one nonionic oxyalkylenated saturated or unsaturated C8-C40 fatty acid amide, and also to a device suitable for performing this process.
