[Blog Post] Analysis of cover attachment and VMS binding.

[Wladimir D]

Continuation. Original text with pictures. You are not allowed to view links. Register or Login to view. 
 
The post uses new photographs of the manuscript taken by Lisa Fagin Davis.
What I in the first part called the main thread T4 (which attaches notebooks to the supports) must be divided into 3 (or even 4) types.
Thread T4r (r - right) with right twist of the thread. The thread is used at the beginning and at the end of the manuscript.
Subvariant T4r1 - with a weak twist of the thread. But it can be the same thread, if the top stitch was made with the rest of the thread loosely dangling when threading the needle into the eyelet.
Thread T4L (L - left) with left twist of the thread.
It is used in the middle of the book in notebooks that follow in a row (possibly in Q8, since the extended section of the thread may not be native in this notebook).
A special case of threads in notebooks Q10, Q11 (again in a row).
The yarns appear uneven in thickness with alternating fiber directions.
It looks like a thread - a pigtail, woven from 3 thin threads. (T4p - pigtail). The visual change in the thickness of the thread occurs due to the fact that the thread lies in a spiral, and where it is photographed in profile it becomes thinner (green rectangle).
The alternation of the types of T4 threads rather indicates a different repair time (or different craftsmen who had their own types of threads). It is unlikely that the master in Q5 ran out of threads, and he began to use the first threads he came across, and then went to the shop and continued to sew T4r.
In post 2, I demonstrated that Q9 is possible through a gasket, sewn to the bottom false and central supports with T3 thread.
Lisa's new photos confirm this. Thread T3 lies under thread T4L. The T4L thread pierces the spacer and sheet in the center of the support, while the T3 wraps around the support from above. As a result, T3 is on the surface in an area equal to half the width of the support.
Incomplete fastening with T3 thread was done earlier than T4L, since the firmware with T4L thread was made tightly and efficiently, and there is no need for additional fastening.
It is difficult to determine from the photograph, but I am inclined that there is a knot on the upper false support Q12 (Not Q11). The Q13 fastening twine is pierced through it.
It looks very strange that it is on Q11, Q10, Q9, Q8, Q6 that there are no nodes on the upper false support (stubs stick out), despite the fact that the upper ties of the notebook binding exist. But the binding thread of these notebooks is not a standard T4r, but either a pigtail or T4L.
Unfortunately, Lisa did not take (or did not post) photos with the details of fastening the node on the Q8.
I described one variant of its attachment in the first part.
Second option. The overgrown area is tied to a thread stub on the lower support (multi-colored twine in the figure). A broken short thread (black - white) sticking out of the support is fastened with a multicolored piece twine, using the third thread. You don't even need to open the cover for this, but an assistant is needed for tight tension.