Transparent flat plastic window of a vehicle with lined injection mark, method of production and use thereof

A flat transparent plastic moulding (1), especially a plastic screen, comprises at least one moulding point (4) on the optical surface (1.2) of the moulding. The moulding point is covered by a material (2) which is less transparent than the plastic moulding. The moulding point is near the edge of the optical surface, and at least one of the optical surface moulding ribs is completely embedded in the plastic. The moulding is formed by injection moulding using a direct injection technique, and covering the moulding point with a covering material of reduced transparency.