Even thermal crack I

Evenly distributed thermal load - from low to high intensity
Type of glass

Polished glass, figured (ornamental) glass, rolled sheet glass, laminated glass. In case of armoured glass, deviations are possible due to the grid.

Examples

Partial darkening with inside blind in close proximity to the glass;

Partial covering with interior decoration in close proximity to the glass;

Shadow from the roof;

Dark spots on the glass (stickers, advertising, etc.).

Beginning

Right-angled edge crack;

Right-angled transition angle;

No curvilinear cracks in the beginning.

Lines of process

Along the cold / heat zone;

Later the line is slightly curvy.

End

Straight line;

Without an angle;

Most often progressive (depending on partial covering).

Other features

Possible deviation of cracking edges;

Rare curvilinear cracks;

Possible curvy lines.