Abstract
Anisotropic laboratory and industrially manufactured papers were use to reinforce an epoxy resin. The degrees of anisotropy of the papers as well as of the composites were evaluated by tensile properties. It was shown that the anisotropy of the Zero Span Tensile Index of the papers is close to that of the later composites, while the long span tensile properties of the papers are strongly affected by frozen in tensions that do not contribute to the composite properties. The Zero Span Tensile Index can be used to predict the composite strength of oriented paper reinforced composites.