Abrasiveness - What is abrasiveness?

Answer:

A property of materials that describes the extent to which that material will cause abrasion damage to another material due to friction occuring as the two materials rub together. The friction between the two materials will cause one or both of the materials to be abraded, which could take the form of scratches, scuffs, cuts, or a simple gradual wearing away of the material's surface.  

In labelling, the materials used to make labels (including the face material, any coatings, and the inks or toners used to print on the labels) should not be too abrasive, as this can cause damage to any of the machines that they are processed by (including printers, presses, converting machines), as well as any surfaces that they may later come into contact with during storage and/or their intended application.