Ink/pen dynamics and the rhythms of writing

[oshfdk]

I think I saw something like this, but overall this doesn't seem to happen in VMS. I think that's the difference between a crow's feather with two simple cuts and no further processing or cleaning and a specially made quill pen used by a professional. My point is that it's not easy to make conclusions about what exactly happened to this or that stroke of VMS because there are too many variables at play.

I agree that where there are visually similar defects in several elements on a page, while absent on other pages, it's likely that all these elements were produced by the same instrument in one session. 

As far as I understand, we are now trying to identify whether the following sets of features 1 and 2 are of the same kind/origin. It's not clear to me that we know enough about the scribal practices to do this.