The claimed Voynich page

[Fabrizio Salani]

[quote="Fabrizio Salani" pid='82307' dateline='1775117384']
Correct, the problem is that on the parchment treated with lime, there is no trace of charcoal, graphite, or silver

The residues left by that "poor man's carbon copy" method would be very faint, and in the end they would be either covered by the paint of completely erased.  I doubt very much that they could be detected by routine lab methods.  

Assuming that the piece is modern, the "graphite" of the pencil would be very fine graphite powder mixed with clay and some wax.  The few particles that might remain after erasure would be hard to distinguish form ordinary dust.   

Moreover, if the sample is cleaned of dust before the analysis (like the samples used in the C14 dating were), the cleaning would probably remove most of the remaining "graphite" partticles, since they would not be bound to the vellum (like ink and paint are).

there are no grooves in the characters or the drawing (the grooves are visible on the back of the horizontal lines).

So this item has scribed guide lines - on the back?

Yes, there are some lines called "fillet" during the analysis (XRF spectrum: Calcium, Potassium, Iron). They are only on the back and do not match the design on the front. They are the remains of a fillet covered after the parchment was treated with calcium.