Composite moulding materials

A method of manufacture of a composite molding material comprising:

• applying a graphene or graphitic dispersion to a fibrous layer at one or more localized regions over a surface of the fibrous layer,
• wherein the graphene or graphitic dispersion comprises:
• a carrier medium, and
• particles suspended in the carrier medium and selected from the group consisting of:
• graphene nanoplates, graphene oxide nanoplates, reduced graphene oxide nanoplates, bilayer graphene nanoplates, bilayer graphene oxide nanoplates, bilayer reduced graphene oxide nanoplates, few-layer graphene nanoplates, few-layer graphene oxide nanoplates, few-layer reduced graphene oxide nanoplates, graphene or graphite nanoplates of 6 to 14 layers of carbon atoms, graphite flakes with nanoscale dimensions and 40 or less layers of carbon atoms, graphite flakes with nanoscale dimensions and 25 to 30 layers of carbon atoms, graphite flakes with nanoscale dimensions and 25 to 35 layers of carbon atoms, graphite flakes with nanoscale dimensions and 20 to 35 layers of carbon atoms, and graphite flakes with nanoscale dimensions and 20 to 40 layers of carbon atoms,
• wherein the dispersion is applied to the fibrous layer using at least one valvejet print head, and
• wherein the graphene or graphitic dispersion applied to the fibrous layer has an area density in a range of 1 mg/m2 to 2000 mg/m2.