A mixture comprising a poly-ene macrolide and an antioxidant. This mixture or photoinitiator composition can be used to cure acrylates or other photocurable compounds, particularly in an oxygen-containing environment, and the photocurable compositions can be used to form various articles. Machining is carried out by fixing the sheet-like workpiece in the machining area on the movable table and by irradiating the laser beam while moving the movable table relative to the laser beam. The present disclosure may be applied to intelligent services based on the above technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.