The glue lies not only in the cracks,
but also beside them. Perhaps the
surface was not cleaned during the
application (reflection).

At the bottom is a glass piece
with a completely treated surface.

The red flash glass is badly corroded;
the red layer on the interior partially lost.
The glass is less corroded by the dark
lines than in the unpainted regions.

The light green-brown coating
near the lead is noteworthy. Similar
coatings, perhaps pigmented coatings
of sodium silicate, are visible in many
of the most lustrous pieces of glass
throughout the cycle.