a method of manufacturing fibre - reinforced plastic articles out of prepregs , prepregs for the manufacture of fibre - reinforced plastic articles and fibre - reinforced plastic articles manufactured by such method . the prepregs contain glass - fibre mats having a fiber length of preferably 4 to 30 mm and a curable resin having a preferred viscosity in the range between 100 and 100 000 ns / m 2 . the prepregs are shaped in a mold by vacuum forming and are cured by uv - light .