The process of passing fabric through a calendar in which a highly polished, usually heated, steel bowl rotates at a higher surface speed than the softer (for example, cotton- or paper-filled) bowl against which it works, thus producing a glaze on the face of the fabric that is in contact with the steel bowl. The friction ratio is the ratio of the peripheral speed of the faster steel bowl to that of the slower bowl and is normally in the range 1.5 to 3.0.
Textile Resource (http://www.textile.org.uk)
