|Fabric, dry rubbed, mostly on the left side.|
On an industrial scale, calendering is done by running otherwise completed fabric through large rollers, and applying lots of pressure. I have no idea how much rubbing the Viking women applied to their linen; a certain amount of trial and error will be required here.
The first photograph shows the fabric after it had been rubbed for about a minute with the glass stone; again, click the photograph to see it bigger and with more detail. The result was a pronounced smoothing of the fabric, but only a faint increase in shininess that doesn't show up very well in the photograph.
At that point, I started looking for more information about the process. Phiala's String Page states that linen can only be cold pressed (i.e., without heat) so long as it is damp, and I have seen similar comments on other educational sites. That suggests that damp rubbing appears to be the way to go--particularly given my lack of obvious results from dry rubbing. But how damp? Slightly, or just short of dripping? And for how long? I suspect that if linen needs to be damp in order to be modified this way, the rubbing probably needs to continue until the linen is dry.
Thank heaven I only have two yards of linen to handle.
There will be more on this subject after I have had time to experiment with damp rubbing.
EDIT: To correct my spelling error: Rubbing fabric to smooth it and give it a nice finish is called "calendering," not "calendaring".