Hybrid crack I

Thermal / mechanical load

Type of glass	Polished glass, rolled sheet glass, laminated glass, figured (ornamental) glass.
Examples	Diverse effect through surface load (vacuum, wind) for already thermally loaded glass.
Beginning	Gentle angle of edge cracking; Gentle angle of transition; Curvy cracks in close proximity to the glass edge; Unrecognisable cracking centre.
Lines of process	Thermal beginning of cracking with the change of direction near the cold/heat zone, later curvy forms and after as a mechanical crack from straight to angular lines.
End	Straight lines; No angles.
Other features	Possible curvy cracks on the surface.

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