Composites are materials which consist of fibres or fabrics embedded in a matrix, e.g. a polymer. Among the different types of composites, those based on carbon fibres or rovings are of growing importance because of their excellent strength and stiffness to weight ratio. Well known fields of application are structural components and parts of the body of aircrafts or motor cars. Such applications require high tenacity and also a flawless texture of the fabric structure which all can be assured with Textechno instruments.