Without these dots, the glass could become loose and eventually fall out of the frame. These frits are also there for aesthetic purposes.
Without these dots, the glass could become loose and eventually fall out of the frame. These frits are also there for aesthetic purposes.
I thought the transition from pure black to window with dots was made for thermic reasons, so there is not a hard line between hot and cold glass, and with that less stress on the material.
The complete black border is probably for holding it to the glue, I suspect.