panel 13, condition of internal surface
Glass: seems to be less deteriorated
on the internal face. It is possible to see
hole alterations dispersed over the
surface of the glass.
Paint: ancient painting with thick line
and wash-drawing. Brown-red painting
Lead: good condition
Putty: dry and waterproof
Deposits: Thick and hard white (brownish) deposit on most of the pieces, possibly
from distemper or mastic residue.
These deposits often conceal
the corrosion of the glass.