|Transmission (without scattering)|
Transparency is important in tracing, reproduction and packaging papers. A completely transparent paper would be one that transmitted, without scattering, all of the light falling on it, and a clear view of an object would be had when the paper was placed between the object and the viewer, regardless of the distance between the paper and the object. If, on the other hand, a paper has a tendency to scatter light, its transparency will depend upon the distance between the paper and any object being viewed through it.
Reference: "Properties of Paper: An Introduction" - Scott, W.E & Trosset, S. p. 84 (1989)